marathon · 42.195 km
the marathoner's passport.
A marathon is not just a race: it is a four-month project and a lifelong collection. The calendar near you and the world majors, your exportable 16-week plan, the BQ hunt and your medals — all in one place.
the runner's ladder
from the 42k to the world. how far will you go?
marathon calendar
all races upcoming marathons
beyond your area
The marathon workshop
Your 16-week project, step by step
Countdown by phases, predictor, plan by level, corrals, the wall at km 30, BQ and the majors passport — the marathon is won in training. Come back every week: your plan lives here.
Next marathon · September 27, 2026 · Buenos Aires
Marathon predictor
How fast will you run your 42K?
Enter your best 5K, 10K or half marathon time. We use the Riegel formula to estimate your marathon and the plan you need.
Most accurate estimate — the half marathon is the best predictor of the 42K.
Enter your best Half (21K) time to see your 42K prediction.
Field Test · VO₂max / VDOT
Calculate your zones without a prior race
The lab myth
"To know my training pace I need a stress test in a sports lab."
Evidence — Cooper 1968 (JAMA): the 12-minute test correlates r=0.897 with lab-measured VO₂max. Jack Daniels (Running Formula, 2014) built VDOT — a functional VO₂max approximation directly from track performance. Your GPS watch already estimates it with ±10% error (Sievi 2022). None of the three requires a lab.
Choose your test
Have a recent 5K, 10K, or 21K PR? → use the First Marathon Predictor — it's more accurate than field tests.
⚠️ Use as a starting point, not dogma
A field test VDOT has a ±3-5 point margin. Validate zones in your first 3-4 weeks of training: if Zone E feels too easy or too hard, adjust by 2-3 points.
Training plan
What's your goal?
Pick what you want to achieve. Then 2 questions reveal your McMillan archetype — and fine-tune exactly what kind of training you need.
Every published marathon includes the 16-week .ics plan with phases and VDOT paces — download it from the event page.
Heart Rate Variability · HRV
Am I ready to train today?
HRV detects recovery state ~24h before you feel it. The most powerful tool for the serious runner — and the most overlooked.
Common MYTH
"If I feel good physically, it's a good day for a hard workout"
EVIDENCE (Buchheit et al. 2013)
The autonomic nervous system silently accumulates fatigue. HRV detects it ~24h BEFORE the runner feels it in legs and performance. In marathon training, overtraining doesn't feel like overtraining — it collapses at km 30.
What does HRV actually measure?
HRV measures millisecond variation between consecutive heartbeats. The standard metric is RMSSD — the root mean square of successive differences between intervals. Higher RMSSD = greater parasympathetic activation ("rest and digest") = more recovered and adaptable nervous system.
High HRV
Well recovered
Normal HRV
Adaptation in progress
Low HRV
Incomplete recovery
Factors that lower HRV: intense training, poor sleep, stress, alcohol (even 1 drink), incipient illness, dehydration.
How to measure your HRV (3 options)
HRV4Training · camera app (recommended)
~$15/añoOne minute with finger over the rear camera on waking, before getting up. No accessories, no Bluetooth. iOS and Android. Gold standard for amateur runners — Andrew Flatt, PhD validated it against clinical ECG.
Polar H10 + chest strap (most accurate)
~$90 USD5 minutes lying down. Most used in running research. Compatible with HRV4Training, Elite HRV and Polar Flow. Ideal for runners who monitor cardiac effort in detail.
Garmin Body Battery / Whoop · nightly proxy
you have itNot pure RMSSD but a proprietary index based on nightly HRV + sleep. Useful as a trend (low 3 days = signal), less accurate for daily decisions. Whoop gives the best sleep context; Garmin is most accessible if you already have the watch.
Golden rule: always measure at the SAME time (on waking, in bed, before getting up). Timing consistency matters more than the device.
Daily decision traffic light
The traffic light is based on YOUR 7-day rolling average — not absolute values. Calculate the % your today's reading is of that average.
GreenHRV ≥ 100% of your 7-day average
Planned session unchanged. Good day for quality blocks.
YellowHRV 90–100%
Quality session → reduce intensity by 20%. Easy runs: unchanged.
OrangeHRV 80–90%
Zone E only or light cross-training (swimming, stationary bike, walking).
RedHRV < 80%
Complete rest or <30-min walk. If it lasts 3+ consecutive days: consult a doctor.
HRV across the 16-week plan
HRV behavior changes by phase. Understanding what to expect prevents the runner from panicking or canceling sessions when the plan is working correctly.
5 HRV mistakes amateur runners make
Golden HRV rule for marathon: HRV doesn't decide your training — it confirms whether the designed plan has the right load for you today.
One month of data is more valuable than an elite reading on day 1. The 30-day trend is what your coach would use to adjust load.
→ HR zones (bpm)→ Training zones (pace)→ Taper science→ Post-marathon recovery→ Chronic red HRV: OTS protocol→ Sleep · nocturnal recovery→ Cardiac coherence · actively raise HRV→ Adaptogens · cortisol & HRV
Buchheit et al. 2013 (Int J Sports Physiol Perform) · Plews et al. 2013 (J Sports Sci) · Flatt & Esco 2016 (Int J Sports Physiol Perform) · Buchheit 2014 (Br J Sports Med)
Myth vs. Evidence
Overtraining in the marathon
The most costly myth in running
"When performance drops, train harder."
Evidence — Meeusen et al. 2013 (ECSS/ACSM Consensus): adding load when already in non-functional overreaching deepens the deficit and can turn weeks of recovery into months. Overtraining isn't felt — it collapses at km 30.
The spectrum: from normal fatigue to syndrome
Not all fatigue is overtraining. The spectrum has 3 levels with radically different treatments.
Occurs when accumulated load exceeds recovery capacity over several weeks. The runner tries to fix it by training harder — which worsens the situation. Key: performance drops even though perceived effort is THE SAME.
Signs:
- Performance drops >5% in 3 consecutive sessions at same RPE
- HRV: 3 or more consecutive red days
- Morning HR elevated >7 bpm above 7-day average
- Low motivation, disrupted sleep
- Irritable or flat mood
What to do:
Stop the structured plan. 1-2 weeks Zone E only (max 50% usual volume). Monitor HRV daily. If it rebounds to green in 5-7 days → resume with reduced block. If not → suspect OTS.
The 3+5 rule: when to suspect NFOR
If performance drops >5% over 3 CONSECUTIVE sessions at the same RPE (perceived effort), don't wait — it's likely NFOR. It's not 'a bad day,' it's a signal that the autonomic nervous system needs structured rest.
3
consecutive sessions
+
5%
drop at same RPE
Highest-risk weeks in the 16-week plan
Weeks 7-9
Build
Risk: Medium
First volume ramp + first I-pace intervals simultaneously. The runner hasn't mastered mixed load yet.
Weeks 10-13
Peak
Risk: High
Maximum volume + maximum intensity simultaneously. 80% of NFOR cases in marathon runners occur here (Kreher & Schwartz 2012).
Post-race week
Recovery
Risk: High if ignored
Running a half marathon or tempo race in plan weeks 8-10 WITHOUT a recovery week = hidden accumulation.
TSS/ACWR vs. OTS: complementary tools
Load calculators (TSS, ACWR) measure accumulated STIMULUS — useful for prevention. The OTS protocol identifies when overload HAS ALREADY OCCURRED. If your ACWR exceeds 1.5 and you simultaneously have 2+ signals from the list above, apply the NFOR protocol without waiting for more signals.
Golden rule
When in doubt between resting one more day or training — rest.
One extra rest day in week 11 does NOT ruin 10 weeks of work. One training day in deep NFOR CAN convert 2 weeks of recovery into 8.
→ Daily HRV monitoring→ HR zones→ Training zones (pace)→ Post-marathon recovery→ Common injuries→ Iron & ferritin (differential diagnosis)→ Adaptogens · chronic cortisol
Meeusen R et al. 2013 (Med Sci Sports Exerc — ECSS/ACSM Consensus) · Kreher JB & Schwartz JB 2012 (Sports Health) · Halson SL 2014 (Sports Med) · PMC12258013 2025 (Recreat endurance athletes OTS case series)
Sleep & recovery in the marathon
Training destroys muscle. Sleep rebuilds it. If you cut sleep, you cut adaptations.
✗ MYTH
"6-7 hours of sleep is enough if I feel fine waking up"
✓ EVIDENCE
Mah 2011: athletes who slept 10h instead of 7-8h improved 17% in sprint speed. Additional sleep has measurable ROI.
What time should I go to sleep?
8h · Base / Taper
22:00
9h · Build / Peak
21:00
COUNT BACKWARDS from your wake time. Include 15-20 min sleep-onset latency.
Optimal sleep by plan phase (16 weeks)
Sleep debt or overtraining?
Symptoms overlap — but treatment differs. Identify which one you have first.
| Symptom | Sleep debt | Overtraining |
|---|---|---|
| Low HRV | Yes, improves in 1-2 nights | Yes, persists >1 week |
| Heavy legs | Disappears with 1-2 nights | Persists even rested |
| Irritability | Yes (elevated cortisol) | Yes + running apathy |
| High resting HR | 2-5 bpm above normal | >8 bpm above normal |
| Solution | 1-3 nights of 9h | 1-2 weeks Zone E only |
If unsure: 2 consecutive nights of 9h. If symptoms disappear → it was sleep debt. If they persist → check #sobreentrenamiento.
The 5 sleep mistakes marathon runners make
Sleep protocol for marathon runners
1. Fixed bedtime (±30 min)
The circadian clock works best with consistent schedules. A runner who sleeps at 10pm on weekdays and 1am on Fridays 'resets' the cycle twice a week — the equivalent of weekly jet lag.
2. Room temperature: 18-20°C
Core body temperature must drop ~1°C to initiate deep sleep. In warm climates: A/C at 19°C, or socks to open peripheral vessels and dissipate heat.
3. Blue light blocking 90 min before
Enable 'Night Mode' / 'Reduce White Point' on your phone. Or blue-light blocking glasses (~$15 USD). Phone night mode partially filters — physical glasses are more effective.
4. Magnesium glycinate 200-400mg, 30 min before sleep
Mg activates GABA receptors and inhibits nocturnal cortisol. For runners in peak weeks (wks 10-13): magnesium glycinate is the best cost-benefit supplement for improving deep sleep quality. See #vitamina-d-magnesio for the correct form.
5. Last intense workout: at least 4h before sleep
Evening training (>7pm) elevates cortisol and adrenaline that take 4-6h to normalize. An 8pm summer long run may translate to 1am before the body enters deep sleep.
The marathon runner's golden rule
Sleep is not the time 'left over' after training. It IS the training. Hausswirth 2014 showed that 3 nights of 5h erase the equivalent of 2 well-rested training weeks. If you have to choose between sleeping 8h and going for an easy 45-min run: sleep the 8h.
cardiac coherence · 0.1 Hz · active HRV
5 minutes that raise HRV without running a single extra meter.
myth
"To improve HRV I just need to train better and rest more — there's nothing I can actively DO to raise it"
evidence
McCraty 2010 + Gevirtz 2013: breathing at 6 cycles/min syncs the baroreflex → amplifies RMSSD 3–5× in the moment and +12% persistently in 6–8 weeks. Cardiac coherence IS active HRV training. RunDida has no equivalent module.
Coherence timer · 5 min
6 cycles/min
Sit with your back straight. Inhale gently 5 s → exhale gently 5 s. No pause between phases. Let the circle guide the rhythm.
✦ Golden rule: 5 min before sleep, every day of the 16-week plan. Consistency beats intensity — one daily 5 min session is more effective than two 10-min sessions on alternate days.
3 mechanisms of cardiac coherence
Protocol by phase of the 16-week plan
5 runner mistakes with cardiac coherence
scientific basis
- McCraty R & Childre D (2010). Coherence: Bridging personal, social, and global health. HeartMath Research Center.
- Gevirtz R (2013). The promise of HRV biofeedback: Some preliminary results and speculations. Biofeedback, 41(3).
- Lehrer PM et al. (2020). Heart rate variability biofeedback improves emotional and physical health and performance. Front Psychol.
- Jarczok MN et al. (2013). Autonomic nervous system activity and workplace stressors — a systematic review. Neurosci Biobehav Rev.
- Thayer JF et al. (2012). A meta-analysis of heart rate variability and neuroimaging studies. Neurosci Biobehav Rev.
Physiology · Nutrition
Iron & Ferritin for the Marathon
The most common cause of fatigue in endurance runners — and the most overlooked.
Myth
"Fatigue in plan weeks 8–12 is overtraining — I just need more rest."
Evidence
30–35% of female and 15–20% of male runners have ferritin <30 ng/mL. A blood test resolves the diagnosis in 24h (Burden et al. 2015, BJSM).
Ferritin levels for endurance athletes
General population considers >12 ng/mL normal. For the marathon runner the functional threshold is ≥50 ng/mL.
< 20 ng/mL
Critical
20–30 ng/mL
Low for athlete
30–50 ng/mL
Acceptable
50–80 ng/mL
Optimal
> 80 ng/mL
Elite
< 20 ng/mL: Severe fatigue, compromised performance even without anemia. Immediate supplementation required.
20–30 ng/mL: Suboptimal. Fatigue during load weeks, slow recovery, erratic HRV. Supplement.
30–50 ng/mL: Performance not iron-limited. Maintain with diet and monitor every 6 months.
50–80 ng/mL: Ideal target for competitive marathoner. Better training adaptation.
> 80 ng/mL: Level of high-performance athletes. Achievable with dietary protocol + supplementation.
Why runners lose more iron than any other athlete
3 mechanisms unique to running — none occur in swimming or cycling with the same intensity.
What to ask your doctor for
Request exactly these 3 studies:
- 1Complete blood count (CBC) — Hemoglobin, hematocrit, MCV
- 2Serum ferritin — The key data point — most labs don't include it in basic packages
- 3Vitamin B12 — Another common fatigue cause in vegetarian runners
Ideal timing: 2-3 days after active rest, not immediately post-effort (inflammation skews values).
How long to correct it
Ferritin 20–30 ng/mL
8–12 weeks — Oral supplement + diet optimization
Ferritin 10–20 ng/mL
12–16 weeks — Oral supplement 60–120 mg/day alternate. If race is in <8 weeks: IV iron (doctor).
Ferritin < 10 ng/mL
16–20+ weeks — Mandatory medical evaluation. IV iron if race is imminent.
Golden rule: Start the 16-week plan KNOWING your ferritin. If it's low, correction can overlap with training — you don't need to postpone the race.
Iron nutrition protocol (with Mexican options)
Heme iron (meats) ~40% absorption. Non-heme iron (vegetables/legumes) ~5–12%, but triples with vitamin C.
HEME iron (highest absorption)
| Food | mg | Note |
|---|---|---|
| Beef liver | 6.5 mg/100g | The best |
| Red meat (steak) | 2.5–3.5 mg/100g | Heme iron ~40% absorption |
| Canned tuna | 1.3 mg/100g | Convenient post-workout |
| Chicken thigh | 1.0 mg/100g | Heme, better than breast |
NON-HEME iron + vitamin C
| Food | mg | Tip |
|---|---|---|
| Pumpkin seeds (pepitas) | 8.8 mg/100g | Perfect snack for MX runner |
| Black beans cooked | 2.1 mg/100g | Daily base + tomato vitamin C |
| Cooked lentils | 3.3 mg/100g | Combine with lime |
| Raw spinach | 2.7 mg/100g | + orange juice = 3× absorption |
| Enriched corn tortillas | ~1.5 mg/porción | Check label: look for 'iron' in ingredients |
| Puffed amaranth | 7.6 mg/100g | Mexican granola high in iron |
Timing rule: the hepcidin window lasts 3–6 hours post-intense exercise
Eat your most iron-rich meal at breakfast (before training) or ≥6 hours after intense training. Add vitamin C (lime, orange, bell peppers) to any non-heme iron source. Avoid coffee, tea, or milk within 2 hours of your iron meal — they inhibit absorption by up to 60%.
Supplementation: alternate-day dosing (the secret few know)
Daily iron supplementation TRIGGERS hepcidin the next day, blocking absorption of the next dose. The result: you take iron every day but absorb less than on alternate-day dosing.
Dose
60–120 mg
elemental / alternate day (day 1 yes, day 2 no)
When
Morning
Fasting or with orange juice (vitamin C improves absorption)
Retest
8–12 sem
Control serum ferritin. Don't supplement indefinitely without labs.
If ferritin is <20 ng/mL and the race is less than 8 weeks away, the doctor may indicate intravenous iron that restores stores in 4–6 weeks (vs 12–16 with oral).
Higher risk groups — get ferritin BEFORE starting the plan
- ·Women of childbearing age with heavy periods (2–3× higher risk)
- ·Vegetarian or vegan runners (no heme iron in diet)
- ·Runners at >70 km/week for 3+ continuous months
- ·Athletes returning from injury (immobilization reduces stores)
- ·Runners with chronically low HRV with no apparent load cause
Micronutrients · Performance
Vitamin D & Magnesium for the Marathon
Second and third most common deficiencies in runners — overlooked because their symptoms mimic overtraining.
Myth · Vitamin D
"I train in Mexico — the sun guarantees my vitamin D levels."
Evidence
27–56% of athletes are deficient even in sunny countries. The marathoner trains at 6am when UV < 1 — no VitD synthesis (Larson-Meyer 2010, J Am Coll Nutr).
Myth · Magnesium
"If I don't have nighttime cramps, my magnesium is fine."
Evidence
Cramps are the least common symptom. Insomnia, slow recovery, and erratic HRV are most common. 30–40% of endurance athletes have suboptimal intake (Nielsen & Lukaski 2006).
Vitamin D levels for the endurance athlete
Lab norms consider >20 ng/mL sufficient. For the marathon runner the target is 40–80 ng/mL (Sports Medicine 2020).
< 20 ng/mL
Deficiency2× stress fracture risk, compromised muscle synthesis. Urgent supplementation.
20–30 ng/mL
InsufficiencyFunctional but suboptimal for athlete. Slow muscle recovery. Supplement.
30–50 ng/mL
NormalGeneral population range. Marathon runner needs the upper half of this range.
40–80 ng/mL
Athlete optimalIdeal target. Maximized protein synthesis, robust immune system, lower injury risk.
< 20 ng/mL: 2× stress fracture risk, compromised muscle synthesis. Urgent supplementation.
20–30 ng/mL: Functional but suboptimal for athlete. Slow muscle recovery. Supplement.
30–50 ng/mL: General population range. Marathon runner needs the upper half of this range.
40–80 ng/mL: Ideal target. Maximized protein synthesis, robust immune system, lower injury risk.
The early-bird runner paradox
VitD synthesis requires UV index ≥3. In Mexico City, Guadalajara and Monterrey, that index is only reached between 10am and 2pm. The runner who trains at 6am — peak volume time — has solar exposure with UV=0 or UV=1 → zero vitamin D synthesis, regardless of how much time they spend outdoors.
Solution: 15–20 min sun on arms/legs between 10am–2pm, 3× week, OR 1,000–4,000 IU/day supplement.
Why low VitD wrecks the marathon plan
Vitamin D sources and supplementation
Food sources (limited)
- Fresh salmon400–600 IU/100g
- Canned sardines270 IU/100g
- Canned tuna (water)150 IU/100g
- Fortified milk/yogurt80–120 IU/porción
- Egg yolk40 IU/unidad
Diet alone rarely reaches the 1,000 IU/day needed for the athlete.
Supplementation protocol
- ·Maintenance dose: 1,000–2,000 IU/day
- ·If VitD < 20 ng/mL: 4,000 IU/day × 8-12 weeks, then reduce to maintenance
- ·Form: D3 (cholecalciferol) — more effective than D2
- ·Timing: with breakfast or a fat-containing meal (VitD is fat-soluble)
- ·Safe upper limit: 4,000 IU/day for healthy adults (NIH)
What to ask your doctor for (alongside iron)
The 3 micronutrients of the runner triangle are requested in the same lab panel:
#1 Serum ferritin
Body iron (#iron)
#2 25-OH vitamin D
Active circulating form
#3 Serum Mg + RBC Mg*
*RBC Mg more precise than serum
Best time: weeks 1-2 of the 16-week plan, BEFORE load begins. Repeat at week 10 if there was an initial deficiency.
Tip for your profile · Runner
Get the tests at the start of the plan — especially if you train at dawn (6-8am, UV=0 in Mexico = no natural VitD synthesis) or have been doing 4+ months of high-volume training without micronutrient adjustments. The most common deficiency trio in the marathon runner is: iron (#iron) + vitamin D + magnesium. All three are detected with a basic blood test.
Silent deficiencies · Fourth and fifth
Vitamin B12 & Omega-3
The runner who takes ibuprofen after long runs and 'eats varied' may be deficient in both without knowing it.
Most harmful myth
"I eat animal protein in every meal — my B12 is secure"
EVIDENCE (Pawlak 2013 · Nutr Reviews)
The liver stores B12 for 3–5 YEARS: the runner who reduced meat 2 years ago is depleting reserves WITHOUT SYMPTOMS yet. 52–62% of vegetarians deficient without supplementation. Antacids (omeprazole) also block absorption.
Serum B12 levels for athlete
< 200 pg/mL · Deficiency
Megaloblastic anemia likely, neuropathy developing. Urgent supplementation with doctor.
200–300 pg/mL · Grey zone
Functionally deficient in many athletes. Request methylmalonic acid to confirm.
300–400 pg/mL · Sufficient
Normal population range. High-volume runner may need the upper end.
> 400 pg/mL · Athlete optimal
Ideal goal. Complete myelin synthesis, optimal mitochondrial energy, no mental fog.
Low B12 symptoms — by frequency in runners
😴
Fatigue unresponsive to restMás frecuente
Like overtraining, but without the history of excessive load.
💓
Chronically low HRV without load explanationFrecuente
The ANS doesn't recover well between sessions. First silent signal.
🦶
Numbness or tingling in feet/legsFrecuente
Longest peripheral nerves affected first (neuropathy). Often confused with injury.
🧠
"Brain fog" at km 30+ in trainingModerado
Pace decision-making deteriorates. Runner abandons effort prematurely.
💪
Slow recovery after long runsModerado
Heavy legs 48h+ after the long run. Muscle protein synthesis is compromised.
🩸
Megaloblastic anemia (high MCV in CBC)Menos frecuente
Large but few red blood cells — opposite of iron deficiency anemia (low MCV).
Why it matters for the marathoner — 3 mechanisms
B12 sources available in Mexico
| Food | B12 | Note |
|---|---|---|
| Hígado de res (100g) | 60–70 mcg | Densest source. Local taqueria. |
| Almejas/mejillones (100g) | 17–19 mcg | Fresh seafood from market. |
| Sardinas en agua (1 lata) | 8–10 mcg | Affordable and practical. |
| Atún en agua (1 lata, 170g) | 3–4 mcg | The Mexican runner's go-to snack. |
| Huevo entero (2 piezas) | 1.0–1.5 mcg | Only in the yolk; white contributes 0. |
| Leche entera (1 vaso, 250ml) | 0.9–1.1 mcg | Source for lacto-vegetarians. |
Plant sources (nutritional yeast, algae, tempeh): contain B12 analogues that are NOT bioavailable. Vegans NEED supplementation.
B12 Supplementation Protocol
Maintenance (no deficiency): 500–1,000 mcg/day oral cyanocobalamin. Vegans: 1,000 mcg/day permanently.
Correction (confirmed deficiency): 1,000–2,000 mcg/day for 4 weeks, then reduce to maintenance. With doctor.
Supplement form: Sublingual (under tongue) = better absorption than swallowed, especially if gastric IF issues. Methylcobalamin > cyanocobalamin in bioactivity.
Timing: In the morning, fasting or away from meals to maximize absorption.
Complete runner panel — 4 markers in one test
The 4 micronutrients of the silent deficiency square are requested in the same lab panel:
#1 Serum ferritin
Iron (#iron)
#2 25-OH vitamin D
Active VitD (#vitamin-d-magnesium)
#3 Serum Mg + RBC Mg
Magnesium (#vitamin-d-magnesium)
#4 Serum B12
+ methylmalonic acid if 200-400 pg/mL
For Omega-3: no standard test in MX. The Omega-3 Index (% EPA+DHA in erythrocytes) is from specialized labs. Practical strategy: supplement with 2-3g EPA+DHA/day if consuming <2 servings of fatty fish per week.
Best time: weeks 1-2 of the 16-week plan. Repeat at week 10 if there was an initial deficiency.
NutritionPost-training
Recovery nutrition: what you eat after each long run
The 16-week plan generates 32+ long and intense sessions. What you eat in the following 2 hours determines whether you arrive better or worse for the next week.
Most harmful myth
"I have exactly 30 minutes to eat or I lose my adaptations." — Morton et al. 2018 (Br J Sports Med, n=49 studies): protein synthesis stays elevated 24-48h. What matters is the 2-hour window, not exactly 30 minutes.
What type of session did you just finish?
kg
4:1 CHO:PRO
Post-long run protocol
77g
Carbs first window
1.0–1.2 g carbohydrates per kg bodyweight within first 2 hours
20g
Protein first window
0.25–0.3 g protein per kg bodyweight within first 2 hours
Window: 30–45 min (first replacement) + full meal at 2h
1st replacement (30 min): Smoothie or chocolate milk (natural ~3:1 to 4:1 ratio) within 30 min
Full meal (2h): Full meal with rice/pasta + chicken/tuna + vegetables at 2h
Hydration: 500–750 ml with electrolytes in first hour; then drink to thirst
Most common mistake: Showering, resting, and eating 3-4 hours later. Glycogen replenishes at half speed outside the 2h window.
Why this protocol?
A 28-32 km long run depletes 50-80% of muscle glycogen. The 4:1 ratio restores glycogen 53% faster than CHO alone (Ivy 2002), critical if you train two consecutive days.
MX options for post-long run
| Food | CHO | PRO | Ratio |
|---|---|---|---|
| Chocolate milk (250 ml) | 26g | 8g | 3:1 |
| Smoothie: milk + oats + strawberry (300 ml) | 48g | 10g | 4.8:1 |
| Rice + chicken (100g + 120g cooked) | 44g | 28g | 1.6:1 |
The 3 myths of recovery nutrition
For your profile · Corredor
The simple rule that works for any runner: after the long run, eat something within 30-45 minutes (even if you're not hungry — exercise temporarily suppresses appetite). Chocolate milk, yogurt with fruit, or a smoothie are enough for that first window. Then, a real meal within 2 hours. You don't need special supplements if your regular diet is balanced.
Discover your archetype at #plan-nivel to see your personalized tip.
tool · advanced nutrition
Weekly nutritional periodization
common myth
"I eat the same amount of carbohydrates every training day"
Burke et al. 2011 (J Physiol) + Yeo et al. 2008 (J Appl Physiol): the session type determines how many CHO you need that day — not just training volume in km. Eating the same every day limits the metabolic adaptations that allow you to reach km 35 without hitting the wall.
70 kg
What type of session is today?
Long run day (≥16 km)
1× per week (Sat or Sun)
CHO min
560g
CHO max
700g
PRO target
112g
day strategy
HIGH CHO — max recharge before and during; replenish glycogen within 2h post-run
Why this range? ▸
The long run depletes 50-80% of muscle glycogen. Without sufficient CHO the night before AND on the long run day, the runner hits the wall at km 30-32 ahead of schedule.
MX foods for this day
Cooked white rice
1 taza cocida
Banana
1 pieza grande
Corn tortillas
3 tortillas
Cooked oats
1 tazón
Steamed potato
1 pieza mediana
Whole grain roll
1 bolillo
Weekly distribution by phase of the 16-week plan
Average daily CHO total
7-9 g/kg/día promedio
typical week distribution
2 easy (train-low) · 1 high-CHO long · 2 intervals CHO+PRO · 2 strength
3 nutritional periodization mistakes
Burke et al. 2011 (J Physiol) · Yeo et al. 2008 (J Appl Physiol) · Impey et al. 2018 (Sports Medicine) · Churchward-Venne et al. 2012 (Am J Clin Nutr). Nutritional periodization is an active research area — the ranges here are the best supported for the 42K amateur runner.
🧬
Leucine & protein synthesis · The muscle that decides km 35
Protein is not just quantity — the leucine concentration per dose determines whether muscle rebuilds or keeps waiting.
Myth
"With enough protein, muscle recovers the same at 30 as at 50"
Evidence
Churchward-Venne 2012: the leucine threshold to activate mTOR rises from 1.5g to 2.5-3g after age 45. The muscle isn't deaf — it just needs a louder signal.
Why leucine and not just any protein?
Leucine is the 'switch' amino acid for mTORC1 — the main pathway of muscle protein synthesis. Without enough leucine per dose, mTOR doesn't activate even if daily protein total is correct (Mitchell 2016). It's like having enough fuel but no ignition key. The mature runner's muscle (>45 years) develops 'anabolic resistance': the switch needs more pressure to activate. The solution isn't to eat more protein all day — it's ensuring each post-workout dose has enough concentrated leucine.
Leucine threshold by age group
< 40 yearsyour group1.5–2 g leucina/dosis
Standard threshold Witard 2014
40-50 years2–2.5 g leucina/dosis
Moderate anabolic resistance
> 50 years2.5–3 g leucina/dosis
High anabolic resistance — Moore 2015
Your leucine protocol
Min leucine/dose
1.5–2 g
Standard threshold Witard 2014
Total protein/day
98–119 g
1.4-1.7 g/kg · marathon runners
Optimal protein/dose
30 g
÷ 4 distributed doses
MX foods ranked by leucine
| Food | Serving | Leucina (g) | Protein (g) |
|---|---|---|---|
| 🥛Whey protein(proteína completa) | 30 g (1 scoop) | 2.8 | 25 |
| 🧀Cotija cheese(lácteo MX) | 100 g | 2.4 | 27 |
| 🍗Chicken breast(proteína animal) | 100 g (cooked) | 2 | 27 |
| 🐟Canned tuna(proteína animal) | 100 g | 2 | 26 |
| 🥗Cottage cheese(lácteo MX) | 100 g | 1.6 | 17 |
| 🧀Panela cheese(lácteo MX) | 100 g | 1.5 | 20 |
| 🥚Whole egg(proteína completa) | 2 eggs (120 g) | 1.7 | 13 |
| 🥤Chocolate milk(post-largo clásico) | 350 ml | 1.2 | 14 |
| 🫘Cooked lentils(proteína vegetal) | 100 g | 0.65 | 9 |
| 🌾Puffed amaranth(grano MX) | 100 g | 0.52 | 9 |
✅ Foods reaching your leucine threshold (≥1.5g/dose) for age 35
Post-workout combos that cross 1.5–2g leucine
100g cotija cheese + 350ml milk
easy to carry to the expo or after a run
3.6g
leucina
30g whey + 1 banana
liquid — ideal when appetite is suppressed post-long run
2.9g
leucina
2 eggs + 100g cottage cheese + tortilla
complete, economical, no supplement needed
3.3g
leucina
100g tuna + 100g panela cheese + orange
CHO + leucine together for dual replenishment
3.5g
leucina
3 myths about protein and marathon
For the masters runner (>45 years): the 4-dose rule
Distributing protein in 4 doses of 35-40g with ≥2.5g leucine each maximizes mTOR activation throughout the day. One meal of 80g protein activates mTOR 1×. Four doses of 35-40g activate it 4× — with 4× more total daily protein synthesis. It's not about daily total; it's about signal frequency.
🦴
Collagen & tendons · The protocol RunDida doesn't have
15g collagen + 50mg vitamin C, 1 hour before exercise: the only validated intervention that increases tendon collagen synthesis 2.3× (Shaw 2017).
Myth
"The protein I take post-workout also repairs my tendons — if I eat enough whey, my tendons are covered."
Evidence
Shaw 2017 (Am J Clin Nutr): whey/leucine are not precursors to tendon collagen (Gly-Pro-Hyp). Tendons need hydrolyzed collagen + VitC BEFORE mechanical stress — not whey afterward. They are parallel biochemical pathways.
Why do tendons need their own protocol?
The Achilles tendon and iliotibial band have 4-5× less vascularization than muscle — they receive fewer nutrients and have a narrower synthesis window. Baar K. 2017 identified that collagen peptides must be circulating in the bloodstream at the exact moment the tendon receives mechanical load: the synthesis signal is activated by the stress + available precursors together. If collagen arrives post-workout, the tendon has already closed its window. This is why the protocol is pre-session, not post.
The Shaw 2017 Protocol · step by step
①
T−60 min
Mix 15g hydrolyzed collagen + 50mg VitC in water or fresh limeade
2 Knox packets (14g) + juice of 1 large lime (≈30mg VitC) + half orange (≈25mg VitC) = covered
②
T−0 · La sesión
Perform the strength, strides, or long run session (minimum 6 min of tendon mechanical load)
Squats, jumps, or strides have the highest effect. Long run also activates synthesis though the effect scales with stride intensity
③
T+0 a +2h · Post-sesión
Now: muscle protein (leucine/whey) for muscle protein synthesis
Dual protocol: collagen pre-session for tendons → leucine post-session for muscle. Both pathways activate within their optimal window.
Frequency by phase · 16-week cycle
BaseW1–W6
3×/wkPrepare extracellular matrix before high-load phase
BuildW7–W12
4×/wkReinforce tendons during peak volume (maximum load)
PeakW13–W14
4×/wkMaintain protocol during maximum load weeks + race simulations
TaperW15–W16
2×/wkReduce to 2 days/week — the tendon consolidates with lower load
Collagen sources available in Mexico
🧪
Knox Gelatin (packet)
7 g/sobreHydrolyzed collagen type I/III
💰 ~MXN $15/packet📍 Walmart, Chedraui, Soriana
🍲
Beef foot broth (caldo de pata)
~8-12 g/tazaNatural collagen + free glycine
💰 ~MXN $30-50/liter📍 Market, butcher shop
💊
Hydrolyzed collagen powder
10-15 g/scoop (depende marca)Type I collagen peptides
💰 ~MXN $350-600/kg📍 Farmacias del Ahorro, GNC, Walmart
🍋
Lime juice (vitamin C source)
—Natural vitamin C source
💰 < MXN $5📍 Any storeVitC source
MX anti-injury recipe: 2 Knox packets + juice of 2 limes + 250ml water + pinch of salt = 14g collagen + ~60mg VitC. Cost: < MXN $40. Ready in 90 seconds.
5 common runner mistakes with collagen
For the masters runner and comeback runner: tendons first
After an injury (plantar fasciitis, Achilles tendinitis, IT band), regenerated tissue has lower type I collagen density for 6-12 months (Järvinen 2005). The Shaw 2017 protocol is especially critical during the return phase: the healed tendon needs more synthesis stimulus to reach the original tissue strength. The 50+ runner also has slower collagen renewal — the preventive protocol is their most affordable tendon insurance available.
Creatine for the marathoner
The most studied supplement in sport — and the most misunderstood by the distance runner
Myth
"Creatine causes water retention, makes me heavier and slower. It's for bodybuilders, not marathoners."
Evidence
Creatine water retention is INTRAMUSCULAR — it's not subcutaneous water. Water enters the muscle because it accompanies stored phosphocreatine, and that's exactly what you need for (1) the final sprint km 40-42, (2) reloading glycogen 30-40% faster the week before the race, and (3) maintaining cognitive function when glycogen drops to 20-30% at km 35-42. For masters runners (>45), creatine + strength training is the duo that preserves type IIa fibers that fail first at km 30+.
Kreider et al. 2017 · Vandenberghe 1997 · McMorris 2007 · Brose 2003 · Lanhers 2017
+30-40%
muscle glycogen post-long
0.3-0.8 kg
intramuscular water (not subcutaneous)
>2,000
published studies — gold standard
+35%
strength + muscle mass in masters >50
Calculate your protocol
4 g/día
daily dose
continuo
duration
+0.3 kg
intramuscular water
~$100 MXN
approx. monthly cost
Optimal timing
With post-workout CHO: post-exercise insulin maximizes muscular creatine uptake. Post-run breakfast (rice + chicken + orange juice) is the best timing — absorption +25% vs fasted (Green 1996, Am J Physiol).
4 mechanisms of action for the marathoner
Natural creatine in MX foods
Cooking reduces creatine by 30-50% (heat hydrolysis). To reach the 3-5 g/day maintenance from food alone, you'd need to eat >150 g of raw meat or fish — hardly practical. The monohydrate supplement is the most efficient and economical form (~$200 MXN × 300 g = 60 days).
| Food | Serving | Creatine (g) | Note |
|---|---|---|---|
| 🐟Herring | 100 g | 6.5 | highest natural concentration |
| 🥩Beef | 100 g | 4.5 | red meat, common in MX |
| 🐟Salmon | 100 g | 4.5 | also rich in Omega-3 |
| 🐟Fresh tuna | 100 g | 4 | canned tuna: <1 g (heat destroys it) |
| 🍗Chicken breast | 100 g | 3.4 | loses ~50% when cooked |
| 🥓Pork | 100 g | 3 | pork loin, ribs |
| 🥛Milk | 1 liter | 0.1 | minimal source, not significant |
Protocol by phase of the 16-week plan
Base (weeks 1-6)START HERE
3-5 g/day with post-run breakfast + CHO
Best adaptation window — first 3-4 weeks of maintenance produce full muscle saturation
Building (weeks 7-12)
5 g/day — timing post-strength session
Strides (#strides) and strength (#fuerza) in this phase produce the largest type IIa fiber stimulus — creatine amplifies the adaptation signal
Peak (weeks 13-14)
3-5 g/day — NO loading phase
Glycogen is at its peak — maintenance creatine ensures synergy with CHO loading (Vandenberghe 1997). No dose increases.
Tapering (weeks 15-16)
3 g/day — minimum maintenance dose
Maintains saturated PCr stores for the final sprint without unnecessary load. Water weight stabilizes 2-3 weeks after starting — no additional retention.
3 creatine myths the runner should ignore
Golden rule
Generic creatine monohydrate 3-5 g/day with post-workout CHO = the highest evidence-per-weight-and-cost investment in the marathoner's entire supplement arsenal. Less than $7 MXN per dose. No protocol exceptions in the 3 weeks before the target marathon.
Scientific basis
- · Vandenberghe et al. 1997 (J Appl Physiol) — creatina + CHO: glucógeno +30-40%
- · Brose et al. 2003 (Med Sci Sports Exerc) — fuerza +35% en adultos > 65 años
- · McMorris et al. 2007 (Neuropharmacology) — función cognitiva en ejercicio agotador
- · Rawson & Venezia 2011 (Sports Med) — revisión: resistencia + sprint final
- · Lanhers et al. 2017 (Eur J Sport Sci, meta-análisis) — fuerza + masa muscular
- · Kreider et al. 2017 (J Int Soc Sports Nutr) — declaración de consenso (> 2,000 estudios)
- · Green et al. 1996 (Am J Physiol) — insulina + captación muscular de creatina
RecoveryLoad diagnostic
DOMS: Muscle Soreness as a Diagnostic Tool
Muscle soreness doesn't measure how much you grew — it measures how novel the stimulus was for your fibers. Learn to READ them correctly.
Common Myth
"No soreness, no gain" · "Sore = must rest completely"
Evidence
Cheung 2003: the most adapted athletes have LESS soreness from the same stimulus, not more. Paulsen 2012: decreasing DOMS week over week = real adaptation ('repeated bout effect'). The 16-week plan goal is to reach Peak with minimal DOMS — a sign of maximum adaptation.
3 DOMS Levels for Marathoners
Mild
Feeling of heaviness or muscle tension. Doesn't affect gait or range of motion.
Protocol: Normal training after 48h. Zone E the next day accelerates recovery.
Adaptation signal: Persistent mild DOMS over weeks = no load progression
Moderate
Palpable pain, stiffness when starting movement. Alters stride if you try to run at normal pace.
Protocol: Zone E only for 48-72h. Light-pressure foam rolling. Contrast bath (1 min cold / 1 min warm × 5).
Adaptation signal: Moderate DOMS that DECREASES week by week with same stimulus = adaptation progressing well
Severe
Pain going down stairs, altered gait. Unable to complete an easy jog without limping.
Protocol: 72-96h without running. Active walking (20-30 min). Cold water immersion 10-15°C for 10-15 min within 24h.
Adaptation signal: Repeated severe DOMS with same stimulus (week 3+) = NFOR signal — check #overtraining
How to Read DOMS Throughout the Plan
DOMS by Phase of the 16-Week Plan
The 5 Marathoner Mistakes with DOMS
Masters Runner (>50 years)
Roth 2000 (J Appl Physiol): DOMS resolution time increases to 96-120h in >50 years vs 48-72h in <35 years. Does NOT mean more damage — it means more repair time. Final adaptation can be equal or greater, but requires more patience between sessions. Plan your long runs with ≥5 days margin in your comeback plan, not the standard ≥4.
Golden Rule of DOMS
Decreasing DOMS week over week = plan working. Constant or increasing DOMS = review recovery (sleep, leucine, CHO), not the training. The adaptation stimulus is already there; what's failing is the response.
COMEBACK · RETURN TO MARATHON
Return-to-training protocol
After a training break, your body is NOT where you left it. The science of detraining (Mujika 2000, Coyle 1984) and the Maffetone Method define exactly how long it takes to rebuild your aerobic base — and what to do each week to avoid re-injury.
The most costly comeback runner mistake
"I feel great, Monday I go back to where I was." Coyle 1984: after 15 days without running, cardiac stroke volume drops 12% and VO₂max falls 7%. Motor memory (the brain remembers 5:00/km pace) recovers faster than real cardiovascular capacity — the runner performs as if at 100% with an 85% engine.
Your MAF HR · Maffetone Method
MAF (Maximum Aerobic Function) HR is the HR ceiling for the first comeback weeks: below this value, the body burns mainly fat and rebuilds the aerobic base without accumulating cortisol stress. Above it, before rebuilding the base, re-injury risk rises.
140 lpm
Your MAF HR · don't exceed this limit during comeback
Formula: 180 − 40 age = 140 bpm
In practice: set an HR alert on your GPS watch. If HR exceeds MAF during the run, slow down or walk until it drops back. In the first weeks, going slow is the optimal strategy.
Protocol by break duration
What did you lose physiologically?
VO₂max drops 10–15% or more (Coyle 1984). Reduced muscle mitochondria. Low baseline glycogen. Tendons and ligaments less resilient (lose collagen preload). A rushed return is the #1 cause of re-injury.
Most common mistake
The freshness trap: after a long break the first sessions feel extraordinarily good (no accumulated fatigue). This wellbeing deceives — actual capacity is 15-20% lower. Overuse injury risk is highest in the first 2 weeks.
8-weeks protocol
- 1Weeks 1–2: Pure Maffetone Method — only running at MAF HR (180 − age). No GPS pace, only HR. If HR exceeds MAF, walk.
- 2Weeks 3–4: increase running time 10–15 min per week, always below MAF HR
- 3Week 5: add 1 easy 8–10 min fartlek, only if HR in easy runs dropped vs week 1
- 4Weeks 6–8: progressive long run up to 90 min. Speed only when you can run 60 min comfortably below MAF HR
- 5Week 9+: rejoin the plan 6–8 weeks back from where you were. Adjust race date if needed.
4 signs you're ready to add speed
There's no magic week. These signals tell you when your body has actually rebuilt the aerobic base:
- You can run 50–60 min continuously at Zone E without HR rising >5 bpm at the same pace vs the previous week
- Post-run DOMS disappears in <48h (not 72-96h as in the first comeback weeks)
- Morning HRV stable (± 10% of your personal baseline) for at least 5 consecutive days
- Sleeping 7–8h without difficulty (insomnia from excess cortisol post-break resolves)
Golden rule of the comeback
"The fastest comeback is the one that doesn't end in re-injury"
Heiderscheit et al. 2015: a gradual return reduces re-injury rate 50% vs immediately returning to 100% volume.
Mujika & Padilla 2000 (Med Sci Sports Exerc) · Coyle et al. 1984 (J Appl Physiol) · Maffetone 2015 (The Big Book of Endurance Training) · Nielsen et al. 2014 (Sports Med) · Heiderscheit et al. 2015 (J Orthop Sports Phys Ther)
Entrenamiento y enfermedad
¿Puedo correr si estoy resfriado? ¿Cuánto fitness pierdo si me enfermo en la semana 9?
MITO
"Si pierdo 3-5 días por un resfriado pierdo semanas de adaptaciones — tengo que compensar con más km cuando vuelva"
EVIDENCIA
Mujika & Padilla 2000: el VO₂max no cae significativamente en pausas <10 días para un atleta entrenado. Un resfriado de 3-5 días = 0% de pérdida de adaptaciones. Compensar añadiendo km = error que lleva a lesión o sobreentrenamiento.
50-70%
de maratonistas reporta ≥1 URTI durante el ciclo de 16 semanas
0%
de pérdida de VO₂max en pausa <10 días
72h
de ventana J de inmunodepresión post-long run
2×
más riesgo de resfriado si corres >80 km/sem vs 40-50 km/sem
La Regla del Cuello — tu protocolo de decisión en 10 segundos
Eichner 1993 (Sports Medicine) — el estándar clínico adoptado por el ACSM para deportistas
Sólo por encima del cuello
- • Congestión o moco nasal
- • Dolor de garganta sin fiebre
- • Lagrimeo, estornudos
✅ PUEDES correr en Zona E
al 60% del volumen planeado, sin velocidad
Por debajo del cuello
- • Fiebre >37.5 °C
- • Dolor muscular generalizado
- • Tos con flema / dolor de pecho
- • Vómito o diarrea
- • Fatiga intensa fuera de lo normal
🛑 DESCANSO TOTAL
sin excepción, aunque falten 8 días para la carrera
Timeline de retorno por tipo de enfermedad
Duración típica: 3-5 días
¿Puedo correr? Sí, si los síntomas son sólo por encima del cuello (Neck Check Rule). Corre en Zona E al 60% del volumen planeado.
Retorno al plan: Retoma exactamente donde quedaste. No compenses las sesiones perdidas.
Base: Eichner 1993 — la regla del cuello es el estándar clínico adoptado por el ACSM para deportistas
Protocolo de ajuste del plan según días perdidos
| Días perdidos | Pérdida real de fitness | Qué hacer al volver |
|---|---|---|
| 1-4 días | ≈0% | Retoma exactamente donde quedaste. No compenses. El cuerpo recuerda. |
| 5-10 días | <2% | Reduce el siguiente long run 20-25%. No hagas velocidad la primera semana de retorno. Semana 2: plan normal. |
| 10-20 días | 2-7% | Retoma 2 semanas atrás en el plan. Solo Zona E la primera semana. Velocidad en la semana 2. Plan normal en la semana 3. |
| >20 días | 7-14% | Protocolo comeback (→ #comeback): MAF HR las primeras 4-8 semanas. No intentes recuperar el tiempo perdido acelerando. |
💡 Regla de oro — semana de la carrera (<7 días para el disparo)
Fiebre → no corras, punto. El maratón puede esperar; la miocarditis viral no. Solo moco/garganta sin fiebre → corre el plan (la Regla del Cuello aplica). La adrenalina del día D + el glucógeno cargado compensan 2-3 noches de mal sueño — eso la evidencia lo confirma.
La Ventana J — la inmunosupresión post-esfuerzo que el corredor no ve venir
Nieman 1994 (Int J Sports Med) describió la curva en forma de J del sistema inmune y el ejercicio: ejercicio moderado (40-60 km/sem) protege contra infecciones; ejercicio de alta carga (>80 km/sem, long runs >21 km) suprime temporalmente la inmunidad.
En las 3-72h post-esfuerzo intenso:
- IgA salivar (barrera mucosa viral) cae -50%
- Células NK (natural killer) reducidas
- Linfocitos T -30-40% circulantes
Esto explica por qué el maratonista se resfría justo después de su long run más exigente — no es mala suerte, es la Ventana J.
Los 5 errores del maratonista cuando se enferma
- 1
Entrenar con fiebre 'para no perder la forma'
Error más peligroso: la fiebre sube la FC +10 lpm/°C → el corazón trabaja en Zona T caminando. Riesgo de miocarditis. El fitness se recupera en días; el corazón inflamado no.
- 2
Compensar los días perdidos con km extra
El cuerpo no acumula deuda de km. Sumar km de golpe cuando estás volviendo de una enfermedad es la causa #1 de lesión de comeback. Nunca compenses.
- 3
Volver al plan normal al primer día sin síntomas
El sistema inmune sigue comprometido 24-48h después de la desaparición de síntomas. El primer día de retorno siempre es Zona E al 60%, sin velocidad.
- 4
No ajustar la nutrición durante la enfermedad
El corredor enfermo necesita más proteína (para reparar y para la respuesta inmune) y más vitamina C y zinc. Comer 'lo que hay' alarga la recuperación.
- 5
Ignorar la Ventana J post-long run
Hacer el long run de 28 km el viernes y tomar el metro lleno el sábado = entrar a la semana con las defensas más bajas del ciclo. El protocolo anti-infección del viernes decide la salud del lunes.
Base científica
- • Eichner 1993 (Sports Medicine) — Neck Check Rule: síntomas supra vs infraglóticos
- • Mujika & Padilla 2000 (Med Sci Sports Exerc) — pérdida de VO₂max por pausa corta ≈0%
- • Nieman 1994, 2001 (Int J Sports Med, Med Sci Sports Exerc) — Ventana J: inmunosupresión post-esfuerzo
- • Nieman 2020 (J Sport Health Sci) — curva dose-response ejercicio e inmunidad en corredores
- • Hemilä 2017 (Cochrane Review) — vitamina C y duración del resfriado en atletas de alta carga
- • Maron & Pelliccia 2006 (Circulation) — miocarditis viral y actividad física
Active Recovery
Foam roller, ice bath, compression & massage
When each tool accelerates your recovery and when it can block the adaptations you're seeking.
MYTH: "An ice bath after EVERY hard training session is the best recovery"
EVIDENCE Roberts et al. 2015 (J Physiol, n=21): runners who used ice baths (10°C, 15 min) after EVERY intense training session for 12 weeks gained significantly LESS muscle mass and strength than the passive rest group. Cold blocks the IL-6 + mTOR signal that activates protein synthesis — exactly the mechanism that makes training work.
The strategic rule: Post-long-run ice bath YES (reduces mechanical damage). Post-intervals or strength in Building → NO (you block the adaptation you need to improve). Ice isn't bad — frequency and timing is what matters.
When YES to use it
- ✓Post-long run ≥16 km (immediate, 10-15 min)
- ✓Active recovery days between sessions
- ✓As alternative warm-up before easy session (light, 5 min)
When NOT to use it
- ✗As the only warm-up before intense intervals
- ✗Over an active stress fracture or acute pain zone
- ✗With full body weight on the lateral IT band
Foam rolling protocol for marathon runners (10-15 min)
- 1. Quadriceps: 60 sec each leg · slow (5 sec/pass) · hip to just above knee
- 2. Lateral IT band: 60 sec each side · hip to knee · do NOT roll directly over the knee
- 3. Calves: 45 sec each leg · rotate foot 15° in/out to cover all surfaces
- 4. Glutes + piriformis: sit on the roller, cross ankle over opposite knee, 45 sec
- 5. Thoracic spine: roller perpendicular to spine, T4-T10 zone only (NOT lower lumbar)
- Pressure: moderate. If pain 9-10/10, lift some body weight with your arms.
10-15 min · ideally within 30 min post-long run · daily in Building phase
Which tools in each phase of the 16-week plan?
Golden rule
Active recovery tools do NOT replace sleep, nutrition, or rest. They amplify their effect. A runner who sleeps 5h and takes an ice bath recovers less than one who sleeps 9h with no tools. Priority order: (1) sleep 8-9h · (2) CHO + PRO post-training · (3) foam rolling · (4) ice / compression / massage once the base budget is covered.
Heat Training
Summer heat is your altitude camp
Most runners reduce training in summer and wait for cool weather. The evidence says the opposite: 10-14 days of heat training produce the same cardiovascular adaptations as an altitude camp — at zero extra cost.
Common MYTH
"In summer I reduce training and wait for cool weather to perform again"
EVIDENCE (Lorenzo 2010, J Physiol)
10 days of heat training → VO₂max +7% in COOL conditions (not just heat). The mechanism: plasma volume expands +6.5% — exactly the same adaptation as an altitude camp. Heat is the most accessible 'natural EPO' for marathon runners.
4 confirmed adaptations (Sawka 2011 · ACSM Position Stand)
Plasma Volume
+3-10%
More blood → more O₂ to muscles → same pace, less cardiac effort
Resting HR
-5 lpm
Heart pumps more volume per beat → needs to beat less often
Core Temperature
-0.4°C
At same pace in any climate → engine runs cooler
Sweat Rate
+15-20%
Body dissipates heat faster → superior thermal endurance
Racinais et al. 2015 · Sawka et al. 2011 · Lorenzo et al. 2010
3 acclimatization protocols
1.Days 1-3: 45 min at Zone E, 12-4pm. HRV and HR as arbiters.
2.Days 4-7: 60 min, add 2-3 km at M pace. Drink 500-750 mL/h.
3.Days 8-14: 75-90 min with strides if HRV is stable.
4.If HRV drops >15% of personal avg: back to 45 min Zone E.
📖 Lorenzo 2010: just 10 days of this protocol = +7% VO₂max in cool conditions. Lower cost than altitude camp.
When to acclimatize in 16 weeks?
Warning signs — 3 levels
5 mistakes marathon runners make training in heat
Golden rule
Summer heat is not the marathon runner's enemy — it's the cheapest and most accessible ally for expanding plasma volume. The key is timing: weeks 1-6 of the plan (Base), progressive protocol, HRV as arbiter. In Peak and Taper, the body is already adapted — don't add more stress.
Lorenzo 2010 · Racinais 2015 · Scoon 2007
Training · Conditions · Cold
Running in Cold — More Than Just Layering Up
The warm-climate runner traveling to Boston in April or Chicago in October encounters a completely different physiology. Cold isn't just discomfort: it reduces running economy, triggers bronchospasm, and burns glycogen before km 0. But with the right protocol, it can become an advantage.
MYTH
"For running in cold I just wear more layers and I'm ready — cold doesn't affect performance"
EVIDENCE
Nimmo 2004 (J Sports Sci): muscle at <35°C reduces actin-myosin cycling ~3% per degree → economy drops 3-4%/°C. Bergh & Ekblom 1979: VO₂max reduced by up to 7% at 14°C vs 35°C. Cold also burns pre-race glycogen from shivering (+10-15%) and triggers exercise-induced bronchospasm in 30-50% of runners (EIB). Layering up also doesn't solve corral shivering.
What Cold Does to Your Body (That Layers Don't Fix)
Muscle Temperature
-3-4% economía/°C
Muscles <35°C → slower actin-myosin cycling → same pace costs more O₂
Airway
30-50% corredores
Cold dry air → exercise-induced bronchoconstriction (EIB) → perceived O₂ shortage in km 1-5
Peripheral Vasoconstriction
FC +5-10 lpm
Blood diverted from muscles → less O₂ available → HR rises at same pace as in mild heat
Pre-Race Shivering
+10-15% glucógeno
Waiting in the corral shivering for 30 min = burning glycogen before km 0
3 Cold Acclimatization Protocols
What to Do in Each Phase of the 16-Week Plan?
Base · weeks 1-6
PreparaciónIf local climate is warm but race is in cold: prioritize #calor. If already living in cold: start active exposure protocol. Establish HRV baseline before cold exposure.
Build · weeks 7-12
Adaptación técnicaLong runs with exact race gear if it's already cold. If traveling to the race: 1-2 runs with buff and race gear to practice breathing. No cold baths in this phase — prioritize muscle recovery.
Peak · weeks 13-14
Simulación carreraIf your race is in 3-4 weeks and target temperature <10°C: start active protocol (10-14 days). The two Peak long runs ideally in final race gear. Practice discarding the old jacket.
Taper · weeks 15-16
Solo protocolo carreraZero cold baths — conserve reserves. Only the race protocol: practice the extended warm-up in the Tuesday run of the final week. Buff and hat ready in the bag with the kit.
Race Temperature — What to Expect
5-15°CIdeal
Optimal elite marathon temperature (ACSM). Higher VO₂max due to lower cooling demand. Most world records run in this range.
0-5°CModerate — adjust protocol
Throwaway clothes required in corral. Extended 20-min warm-up. Buff for first kms. Add 1 extra gel to nutrition plan. Endurance Monster has higher risk here due to less heat generation.
<0°CTough — full protocol
EIB (bronchospasm) in 30-50% of runners. Use buff/balaclava ALL the time. Stay moving in the corral — never stop for more than 2 min. If no prior acclimatization, your time may be 3-8 min slower regardless of fitness.
The 5 Mistakes of the Warm-Climate Runner in a Cold Marathon
Golden Cold Rule
Dress to feel cold in the corral — not to be comfortable. Throwaway clothes solve the wait; the body warms up on its own at km 2-3. The 15-min extended warm-up is more valuable than any extra layer. And trust the GPS pace, not how it feels: cold invites going out fast and paying dearly at km 32.
Nimmo 2004 · Tipton 2017 · Butcher 2014
Satellite · Cold
Exercise-Induced Bronchoconstriction (EIB)
"I can't breathe at km 1-5" — it's not a lack of fitness.
Myth
"If I can't breathe in the first kms, it means I'm not fit enough"
Evidence
Helenius 1998: 50% of distance runners with confirmed EIB. Rundell 2002: 30-70% of elite endurance athletes. Training doesn't prevent EIB — it increases chronic cold air exposure. The issue is physiological, not fitness-related.
30-50%
of marathoners have undiagnosed EIB
km 1-5
is the highest-risk window in cold
−40-60%
less EIB with buff over nose and mouth
Formal diagnosis (45 min, once in a lifetime)
The exercise bronchoprovocation test (cycle ergometer + pre/post spirometry) confirms EIB with a clear criterion: ≥10% drop in FEV₁ post-exercise. One test with a sports medicine doctor gives you the definitive diagnosis, the right medication option, and — if you compete with official chip timing — the TUE (Therapeutic Use Exemption) documents for WADA if you decide to use SABA. Sports medicine in MX: IMSS Sports Medicine, sports medicine clinics in CDMX/GDL/MTY.
Why EIB occurs in cold marathon
Prevention protocols
McKenzie & Boulet 2008: 8-10 min of progressive jogging at 60-75% VO₂max before going into the cold 'empties' bronchial mast cells. Degranulated mast cells need 1-2h to recharge their mediators. Result: km 1-5 bronchospasm reduces 50-80% during that refractory period. The only non-pharmacological protocol with direct clinical evidence.
- 1At the hotel/indoor area: 8-10 min of progressive jogging (NOT in the cold corral)
- 2Target intensity: 60-75% of HRmax — feels somewhat effortful but you can talk
- 3Finish with 2-3 short 15-sec accelerations at marathon pace
- 4Go to the corral with your buff on — you have 1-2h of protection
- 5Don't let more than 30 min pass between warm-up and the starting gun
McKenzie & Boulet 2008 (Br J Sports Med) · McFadden 1990 (N Engl J Med)
If EIB hits you in race (km 2-5)
- 1Reduce pace 25-30 sec/km for 5-8 min — do NOT stop (stopping slows bronchial rewarming)
- 2Breathe through your buff or hands cupped over mouth (warms and humidifies air)
- 3Inhale through nose, exhale through pursed lips (extends expiration, reduces hyperventilation)
- 4EIB naturally improves in 10-20 min as muscle temperature rises
- 5If you had a refractory warm-up and it still hits hard: this is the run for nasal breathing (see #respiracion)
EIB golden rule
If you have a persistent dry cough + difficulty breathing in the first cold kms that then IMPROVES on its own after 20-30 min of running, you very likely have EIB. It's not an excuse for underperforming — it's a treatable diagnosis that 70% of runners have without knowing.
Premium cryotherapy
WBC vs CWI — Is $60 USD per session worth it?
Whole body cryotherapy (WBC) feels better than an ice bath, but the science has a more nuanced answer about when it justifies the cost.
MYTH
"Whole body cryotherapy ($60/session) is always better than a home ice bath — it's worth it for any marathoner"
EVIDENCE
WBC wins on perceived fatigue and systemic inflammation, but NOT on measured muscle damage (Costello 2012; Guilhem 2013). Both apply the same Roberts 2015 rule: avoid post-intervals during Build phase. Real ROI depends on your profile and plan phase.
−110°C
WBC — chamber temperature
10–15°C
CWI — water temperature
30×
WBC costs ~30× more per session
Comparison by dimension
Perceived fatigue: WBC wins (+40% reduction vs +28% CWI, Rose et al. 2017). Real difference: you feel better faster leaving the cryochamber.
Muscle damage (CK, LDH): NO statistically significant difference between WBC and CWI (Costello et al. 2012; Guilhem et al. 2013). Blood test numbers will be similar with both.
Systemic inflammation (IL-6, TNF-α): WBC reduces markers 2× faster in the first 6 hours. Real benefit if you have a second workout within 36h.
Post-marathon immunity: WBC temporarily activates NK cells and neutrophils (Brown et al. 2014) → potential benefit during the immune-depression window in weeks 2-3 post-42K.
When is it worth it for your profile?
⚡
Andrés — BQ chaser, 2-3 maratones/año
WBC: positive ROI during peak blocks
Long competitive season with 2-3 marathons = 3-4 sixteen-week blocks per year. During peak weeks (10-14) with 2+ key workouts within 36h, WBC's 2× faster systemic inflammation reduction matters. 1-2 strategic WBC sessions in peak weeks + routine CWI in Base/Build = smart budget allocation.
Sessions: 2–3 strategic WBC/plan + routine CWI otherwise~$120–240 USD/plan
⭐
Dr. Mauricio — Six Star hunter, 1-2 maratones/año
WBC: 1 session post-race as a reward
1-2 marathons/year = regular cryotherapy during training doesn't justify the cost vs CWI. BUT: 1 WBC session on day 1-2 post-marathon has real value via NK cell activation (Brown 2014) during the post-42K immune-depression window. The science-backed 'finisher's reward.'
Sessions: 1 WBC post-finisher + CWI during training~$60–80 USD/año
🔄
Jorge Comeback — 52 años, regresa de lesión
CWI: sufficient; WBC in weeks 10-13 if easily accessible
Post-50 immune systems are more sensitive to exercise-induced immunodepression. WBC's perceived recovery advantage can be psychologically valuable for comeback plan adherence — but the physical ROI isn't better than CWI. Priority order: sleep 8-9h > CHO+PRO nutrition > routine CWI > occasional WBC.
Sessions: Routine CWI + WBC only after peak long runs~$0–120 USD/plan
Protocol by phase of the 16-week plan
Phase Base · wk 1–6CWI
Volume increases week to week — priority is consistency, not premium recovery. CWI after long runs (from week 3) is sufficient. Don't burn WBC budget here.
Phase Construcción · wk 7–12CWI post-largo / Nada post-intervalos
Intervals this phase build running economy. Post-intervals: NO cryotherapy (Roberts 2015 — blocks mTOR). Post-long run ≥24 km: CWI is sufficient.
Phase Pico · wk 13–14WBC estratégico (1–2 sesiones)
The 32 km long run with 4 km at marathon pace + the following week's 5×1000m intervals are the hardest block in the plan. If you have cryo access, 1 WBC post-32K helps you arrive fresh for the intervals 4 days later. Highest ROI of the entire plan.
Phase Afinamiento · wk 15–16Ninguna / solo si hay DOMS persistente
During taper, legs should recover without external intervention. If rare persistent DOMS (altitude travel, very hard last long run): 1 short CWI (10 min). No WBC — the caloric cost of extreme cold can affect glycogen stores during taper.
Golden rule of cryotherapy
If you don't have WBC nearby or $60 USD is a significant expense: ice bath at 10-12°C for 10-15 min delivers 85% of WBC's benefit at 3% of the cost. Optimize sleep, nutrition, and CWI first. WBC is the last 5% of the pie, not the first.
Gear · Shoes
The right shoe for your 42K
The costliest mistake: training 16 weeks in one pair and debuting another on race day. The two-shoe system (training + racing) applies to everyone, from first marathon to BQ chaser.
Training shoe
The one that absorbs 90% of the volume: the 28-32 km long runs, the weekday easy runs, the strength days. More cushioning, more durability (600–900 km), cheaper. It should feel comfortable from km 1 through km 30.
- High cushioning → protects tendons at high volume
- 8–12 mm drop → more natural transition
- 600–900 km lifespan → covers a full 16-20 week cycle
Racing shoe
The one you wear on race day and for the Peak tempo workouts (weeks 13-14). More responsive, lighter, less weight on the foot. Saving it for the race multiplies the psychological boost.
- Reactive foam (with or without a plate) → energy return on every step
- Low weight → ~150-220 g vs 280-320 g for the trainer
- 400–600 km lifespan → lasts 2-3 marathons if you take care of it
Only have budget for one? Start with the training shoe — it's the one that matters most. Plenty of runners race their first marathon in the same pair they trained in. The second pair (racing) is the upgrade worth the money for your second or third marathon.
The racing shoe goes in your race-day bag — see the full expo checklist → · To match your pace to the shoe on race day: pace table →
Training · Injuries
Run the 16 weeks without breaking down
30-40% of marathon plans get interrupted by injury. The 5 most common injuries in 42K runners, how to prevent them and what to do when they show up — before they wreck your training.
30-40%
of plans interrupted by injury
80%
are preventable with strength + protocol
10%
rule for max weekly increase
The golden rule: stopping early costs days, not the marathon
The runner who stops 3 days for a niggle caught in time loses 3 days. The runner who ignores the niggle for 3 weeks can lose the entire marathon. Mild pain that eases as you warm up → keep going with caution. Pain that worsens during the session or makes you limp → stop for the day.
Already injured? post-marathon recovery protocol → · The right shoes prevent 60% of these injuries: shoe guide → · The strength exercises live in your training plan → · Improve form to prevent recurrence: running economy & drills → · The 7 exercises that prevent these injuries: strength guide → · Returning after injury? comeback protocol → · Hill training = lower impact quality sessions: hill protocol → · Tendon protocol (Shaw 2017): collagen + VitC before each session: collagen protocol →
Strength training · 42K
The 7 exercises of your marathon plan
MYTH: «strength training is for bodybuilders, not marathoners»
EVIDENCE: Berryman et al. 2018 (Sports Med) — concurrent strength training improves running economy 2-8% without VO₂max loss. Fredericson & Weir 2006 (JOSPT) — 77% of runners with IT band syndrome have weak hip abductors. The marathon is won in the weight room — specifically in the final 7 km.
📅
These are exactly the 7 exercises that appear as 🏋️ Strength events in your .ics plan (Tuesday + Thursday in Base and Build phases). Download the plan from any marathon page and they sync automatically to Google Calendar / Apple Calendar with instructions.
Strength by plan phase (16 weeks)
Base
Weeks 1-7
2 days: Tuesday + Thursday
Construcción
Weeks 8-12
2 days: Tuesday + Thursday
Pico
Weeks 13-14
1 light day: Tuesday only
Afinamiento
Weeks 15-16
0 days — legs are sacred
Taper (weeks 15-16): zero strength. Legs are sacred — no micro-tears before race day.
Legs· 3 exercises · Tuesday
Glutes / Posterior chain· 2 exercises · Thursday
Core· 2 exercises · Tuesday & Thursday
Golden rule: when NOT to do strength
- ✓ Never the day before a long run or speed session
- ✓ Stop completely in Taper (weeks 15-16)
- ✓ If you feel muscle soreness on Tuesday, skip Thursday
- ✓ Strength sessions are 15-20 min — not gym sessions; never add weight until your form is perfect
Running Economy · Form & Drills for 42K
Running economy explains up to 65% of marathon performance variation between runners with equal VO₂max (Saunders 2004). Fix form, gain free minutes.
Myth
"Perfect running form is for elites — the average marathoner just needs more training miles."
Evidence
Cavanagh & Williams 1982 found 11.5% difference in O₂ consumption between trained runners at equal speed and VO₂max — pure form difference. Saunders 2004 confirms economy explains up to 65% of marathon variation. 6 weeks of drills → 3-6% economy improvement (Franchi 2017, Blagrove 2018). In a 4-hour marathon, 3% = 7 free minutes.
1. Overstriding (overly long stride)
Foot lands far ahead of center of gravity — like a handbrake at every step.
Cost: 7-10% more energy per km; 2-3× greater impact stress on knee and tibia.
Fix: Increase cadence +5-10% (target 176-180 spm): stride shortens automatically without cueing 'land under your hip'.
2. Arms crossing the midline
Arms crossing in front of the chest each stride — generates trunk rotation that wastes energy.
Cost: 3-5% extra energy; premature oblique and lower back fatigue after km 28.
Fix: Elbow at 90°, loose fist (like holding a potato without squeezing). Hands should not cross the sternum.
3. Excessive trunk lean
Bending from the hips (not ankles) compresses the thoracic cage and limits breathing.
Cost: Up to 12% less breathing capacity in km 35-42; greater lumbar muscle workload.
Fix: ~5° lean from the ankles, not the hips. Imagine a string pulling you forward from your sternum.
4. Head down / hunched shoulders
Fatigue causes the head to drop — each kilogram of forward head weight multiplies cervical tension.
Cost: Up to 15% lung volume reduction + cumulative cervical compression. Visible in race photos at km 38-40.
Fix: Look ~15 meters ahead (never the ground). Shoulders dropped away from ears. Mental cue: 'crown up'.
⌚ Configure cadence alerts on your GPS watch
The cadence target (176-180 spm) only matters if your watch alerts you when you fall below it. Here's how to set it up:
Garmin
Training → Alerts → Running Dynamics → Cadence → Below / set 175 spm
Available on Forerunner 255+, Fenix 6+. The watch vibrates and beeps when cadence drops below your target.
Apple Watch
No native cadence alert. Use the 'RunGap' app (free) → Workout → Cadence alert, or set a pace alert as a proxy.
Watch faces like 'Workouts++' show live cadence — check it at aid station stops.
Polar / Suunto
Polar: Training → Sport profiles → Running → Target zones → Cadence zone. Suunto: via Suunto app → Training → Running cadence.
Both alert when outside the cadence zone you set.
COROS
Mode → Running → Alert → Cadence → Min cadence: 175 spm
One of the best cadence alert implementations — haptic feedback is more precise than Garmin.
💡 Set the alert to 175 spm (not 176) to give yourself a 1-step buffer before the vibration interrupts your focus.
Strides & Neuromuscular Training
The training 80% of amateur marathoners skip — and why form collapses at km 35-42
Myth
"Strides are for sprinters and 5K runners. Marathoners only need volume — running fast takes energy away from the long run plan."
Evidence
Paavolainen 1999 (Scand J Med Sci Sports): 9 weeks of neuromuscular training → −8.1% O₂ cost in endurance runners WITHOUT changing VO₂max. Turner 2003: strides + plyometrics → 4.1% economy AT MARATHON PACE. The difference shows at km 30-42.
−8%
O₂ cost
Paavolainen 1999
4.1%
economy at marathon pace
Turner 2003
12 min
per stride session
the complete neuromuscular stimulus
What exactly is a stride?
A stride is NOT a sprint. NOT marathon pace. It's a CONTROLLED effort of 80-150 m at 85-90% of your capacity — faster than 5K pace but not maximal.
Distance
80–150 m
~15-25 sec
Effort
85–90%
5K-1 mile pace
Recovery
2–3 min
WALKING, not jogging
The mechanism: why strides save km 35-42
At km 30-35, muscle glycogen drops to 50-30% of the initial reserve. The brain responds by recruiting more slow-twitch fibers (type I) to compensate — but these fibers are mechanically less efficient. Result: form degrades, cadence drops and O₂ cost rises +5-8% even at the same pace.
Strides train the central nervous system (CNS) to recruit type IIa (intermediate) fibers efficiently even under fatigue. The runner who did strides in the previous 12 weeks arrives at km 35 with a 'trained' CNS to maintain the motor pattern — exactly what separates the runner who 'holds' from one who 'collapses'.
Sato et al. 2021 (n=24 recreational runners): 10 weeks of explosive training → better form index at km 35-42 measured by video analysis. The benefit is neuromuscular, not cardiovascular.
16-week stride plan
Amount:4–6 strides · 80-100 m
Always at the END of the easy Tuesday or Thursday run. The CNS is rested and form is learned cleanly.
How to execute a stride session
- 1Finish your easy run for the day (minimum 30 min). Strides go at the END, never at the start.
- 2Find a flat, clear 100-150 m straight (track, bike path, park). No traffic.
- 3Start at easy pace, gently accelerate in the first 20 m to 85-90%, hold for 60-80 m, and gently decelerate in the final 20 m. Don't stop abruptly.
- 4Walk back to the start: that's exactly the 2-3 min of recovery you need. Don't jog — the CNS needs to recover, not cardio.
- 5During the stride: 180+ spm cadence, landing under the hip, relaxed shoulders, gaze forward. Form is the goal, not the time.
- 6Repeat 4-8 times according to your plan phase. When done: 5 min very easy jog to lower HR before finishing.
The 5 marathoner mistakes with strides
Golden rule
A stride done with bad form is not a stride — it's an injury in progress. Speed is the consequence of perfect form, never the goal. If the body is tired, skip strides that day. If form degrades on stride #3, stop at #3.
Related guides
Sources: Paavolainen et al. 1999 (Scand J Med Sci Sports) · Turner et al. 2003 (Int J Sports Physiol Perform) · Sato et al. 2021 (Int J Sports Physiol Perform) · Rønnestad & Mujika 2014 (Scand J Med Sci Sports)
🏃
Yasso 800s · Gran entrenamiento, pésimo predictor
El workout BQ más famoso del mundo · Ciclo de velocidad para maratón
MITO
"Si corres 10×800m en 3:30, correrás un maratón de 3:30 garantizado."
EVIDENCIA
No existe un estudio peer-reviewed que valide la predicción. Sobreestima el maratón 5-20 min en la mayoría de corredores. Pero como entrenamiento de VO2max: es de los mejores (Billat 1999, Daniels VDOT I-pace).
0
Estudios peer-reviewed que validan la predicción
5-20m
Error típico vs maratón real (Runners Connect)
95-100%
VO2max que activa cada rep de 800m (Billat 1999)
La historia del workout más famoso del running
Bart Yasso, Chief Running Officer de Runner's World, llevaba años corriendo 10×800m donde sus splits en MM:SS coincidían con su tiempo de maratón en H:MM. En 2001 lo publicó en Runner's World y se volvió viral en la comunidad. El detalle que se omitió: Bart nunca dijo que era ciencia — lo describió como una observación personal. La elegancia del juego numérico (3:30 por 800m = 3:30 de maratón) hizo el resto.
¿Por qué coincide para el corredor promedio? Para un runner de 3:30 de maratón, el pace de Yasso (6:00/milla por 800m) cae exactamente en la zona VO2max de Jack Daniels (I-pace). Es una convergencia de la aritmética del corredor promedio — no una ley biológica. En los extremos (corredores muy rápidos o muy lentos), el error es de 10-20 min.
Calcula tu pace Yasso objetivo
hmin
Tu pace Yasso objetivo por 800m
3:30
(Recuperación: 3:30 min de trote muy suave / caminata entre reps)
Daniels VDOT I-pace equivalente: 3:35/800m (±5 seg — la diferencia entre el método folk y el científico)
⚠ Recuerda: este ritmo es para entrenamiento, no para predecir el día D. Usa el predictor Riegel para confirmar tu meta de carrera.
Plan Yasso en las 16 semanas del maratón
El corazón del ciclo Yasso
Semana 7: 4×800m a tu pace objetivo Yasso, recuperación caminando/trote muy lento durante igual tiempo. Agrega 1 repetición cada 10-14 días. Semana 14 = 10×800m = pico de la sesión. NUNCA hagas Yasso el mismo día ni el siguiente de un long run — el SNC necesita 48h.
Meta: completar 10×800m todas en ±5 seg del pace objetivo (sem 13-14)
Protocolo de la sesión Yasso
- 1Calentamiento: 2-3 km a paso muy fácil (Zona E) + 2-3 strides cortos de 100m
- 2Rep 1 a N: 800m a tu pace Yasso objetivo, luego recuperación CAMINANDO o trote muy suave durante el mismo tiempo que tardó la rep
- 3Criterio de corte: si una rep supera el pace objetivo por más de 10 seg, detén la sesión — no acumules fatiga neuromuscular con mala calidad
- 4No mezclar: nunca hagas Yasso el día siguiente a un long run ni antes de uno. Necesitas 48h de recuperación en ambas direcciones
- 5Cooldown: 1-2 km de trote muy fácil + stretching dinámico suave
- 6Registro: anota el tiempo de cada rep (no el promedio). La varianza entre reps revela tu nivel de fatiga acumulada
Los 5 errores del corredor con Yasso 800s
El canon de Yasso es recuperación de IGUAL TIEMPO al 800m (ej. 3:30 de rep → 3:30 de recuperación). La trampa: los corredores tratan 3:30 como recuperación activa al 60-70% del esfuerzo. La recuperación debe ser caminata o trote muy suave — el objetivo es restaurar la fosfocreatina y el ATP, no acumular más km. Sin recuperación completa, las últimas reps se deterioran y el estímulo de VO2max se diluye.
3 mitos sobre los Yasso 800s que circulan en grupos de running
Regla de oro (Billat 1999 + Daniels VDOT)
Los Yasso 800s son un entrenamiento de VO2max de primer nivel — úsalos para subir el techo aeróbico en semanas 7-14. No los uses para predecir el día D. Para confirmar tu meta, corre un 21K a 8 semanas del maratón con energía de sobra al cruzar la línea.
¿Eres Speedster, Endurance Monster o Combo Runner? Descubre tu arquetipo para ver cómo Yasso 800s aplican específicamente a tu perfil fisiológico.
Base científica
- Billat et al. 1999 (Med Sci Sports Exerc): interval training a VO2max — efectos aeróbicos
- Billat et al. 2001 (Int J Sports Med): repeats a velocidad crítica y VO2max
- Daniels & Gilbert — VDOT System: I-pace = 95-100% VO2max, reps 800m-1200m
- Yasso, B. 2001 (Runner's World): observación personal, no estudio controlado
- Runners Connect / HillRunner.com / Marathon Handbook 2024: análisis del error de predicción
🌡️
Tempo Run · El umbral que sostiene el km 30-42
Tercer pilar del tridente · T-pace · Umbral de Lactato
MITO muy extendido
“Los largos fáciles son suficientes para el maratón — el tempo run es demasiado difícil para mi nivel.”
Evidencia (Bassett & Howley 2000 · Daniels 2005 · Jones & Carter 2000)
El umbral de lactato es el predictor más fuerte del rendimiento en maratón — más que el VO2max. El corredor que solo hace largos fáciles mejora su base aeróbica pero no desplaza el umbral: llega al km 32 con el mismo techo de lactato. El tempo run esel estímulo que lo desplaza. Jones & Carter 2000: 12 semanas de umbral → LT +7%, equivale a 3-4 min en el tiempo de maratón.
#1 LT
Predictor de maratón
más que VO2max
+7%
Mejora LT en 12 sem
Jones & Carter 2000
1 sesión
Tiempo en umbral/sem
10-15% del volumen
El tridente completo de intervalos
🌡️
Tempo Run
T-pace
20-35 min continuo
Umbral de lactato · Km 30-42
← Este módulo
Strides (2×/sem en Base) · Yasso (1×/sem en Construcción alternado) · Tempo (1×/sem en Construcción) — nunca los tres en la misma semana
Calculadora de T-pace
T-pace = M-pace × 0.895 · Daniels Running Formula 3ª ed. · ~25-35 seg/km más rápido que tu maratón
Meta maratón
hmin
Tu T-pace (ritmo de tempo)
4:27/km
31 seg/km más rápido que tu M-pace (4:59/km)
Cruise intervals (2×10 min)4.5 km totales
Tempo continuo 28 min (pico)6.3 km
RPE objetivo6.5-7.5 / 10
FC objetivo (aprox.)84-88% HRmax
🗣️ Regla de oro del tempo
Demasiado rápido
No puedes decir ni 2 palabras → I-pace, no T-pace
T-pace correcto
Puedes decir 2-3 palabras con esfuerzo
Demasiado lento
Conversación normal de 5+ palabras → zona E/M
¿Por qué el tempo run funciona?
A T-pace, el músculo produce lactato justo al mismo ritmo que lo depura (estado estacionario de lactato). Con cada sesión de tempo, los transportadores MCT1 (clearance de lactato a la sangre) y MCT4 (exportación de la célula muscular) aumentan en densidad. Resultado: el mismo pace 'umbral' de antes ahora genera menos lactato → el cuerpo puede sostener ese ritmo más tiempo o puede correr más rápido al mismo umbral. Para Andrés (BQ chaser): bajar 4 min en el maratón casi siempre pasa por desplazar el LT, no por mejorar el VO2max.
Plan de tempo por fase — 16 semanas
Progresión diseñada para que el umbral mejore sin causar sobreentrenamiento
BaseConstrucciónPicoAfin.
El corazón del estímulo de umbral
Semana 7: 20 min continuos a T-pace (sin pausas, sin recuperaciones). Agrega 2 min cada 2 semanas: sem 9 → 24 min, sem 11 → 28 min. Es el estímulo más importante del plan de 16 semanas para el BQ chaser: la mejora de LT en semanas 7-12 es lo que hace que el pace de maratón se sienta más 'cómodo' en km 20-30. REGLA CRÍTICA: el tempo va el miércoles; el long run el sábado. Nunca en días consecutivos.
Señal de progreso: en sem 11-12 completas 28 min a T-pace con RPE percibido de 6.5/10 (vs 8/10 en sem 7).
Los 5 errores del corredor amateur en el tempo
Error #1 del corredor que 'conoce' el tempo run. La tentación: 'si T-pace es bueno, un poco más rápido es mejor'. FALSO. A I-pace (Yasso/intervalos), el lactato sube por encima del estado estacionario y las adaptaciones de LT no ocurren — el músculo está en modo anaeróbico, no en modo 'umbral'. El test más simple: ¿puedes decir 2-3 palabras en voz alta mientras corres? Si no puedes decir ninguna, vas demasiado rápido para un tempo.
Descubre tu arquetipo en #plan-nivel para recibir un tip personalizado de tempo.
Base científica: Bassett & Howley 2000 (Med Sci Sports Exerc): LT vs VO2max como predictor de maratón · Daniels 2005 (Running Formula 3ª ed.): T-pace = 88-92% VO2max, ratio 0.895×M-pace · Jones & Carter 2000 (J Physiol): LT +7% en 12 semanas de entrenamiento al umbral · Seiler & Tønnessen 2009 (Int J Sports Physiol Perform): 10-15% volumen en umbral = mayor ROI/km · Billat 2001 (Sports Medicine): cruise intervals vs tempo continuo para fondistas.
Cross-training · Recuperación activa
El día después del largo o entre sesiones de calidad no es un día perdido — es el día donde el corazón sigue adaptando y los tendones descansan. El cross-training cierra el triángulo del plan de 16 semanas.
~95%
VO2max mantenido con aqua jogging
-50%
Lesiones por sobreuso con 1-2 sesiones bici/sem
10-15
bpm menos en bici al mismo RPE que running
🔥
MITO muy extendido
"Los días sin correr son días perdidos. Si puedo correr, debo correr."
🔬
Evidencia (Tanaka 1994 · Lepers 2001 · Alves 2020)
El corazón no distingue si el estímulo viene de correr, pedalear o nadar: adapta a la demanda de O2, no al tipo de actividad. Tanaka 1994 (n=33): 10 semanas de bici/natación producen la misma mejora de VO2max que running puro. La diferencia crítica es el estrés músculo-esquelético acumulado: el corredor que hace 60+ km/semana acumula ~120,000 impactos en tendones, periostio y cartílagos. Alves 2020: añadir 1-2 sesiones de bici/semana reduce las lesiones de sobreuso en 50% sin perder ninguna adaptación aeróbica. Conclusión: el cross-training no es rendirse — es entrenar inteligente.
El error que destruye los planes
Un corredor hace 70 km/semana en sem 10, siente una molestia plantar el lunes y la ignora. El martes corre fácil, el miércoles hace tempo, el jueves otra molestia más fuerte. El viernes: fascitis plantar diagnosticada. Si el lunes hubiera hecho bici 60 min en lugar de trote, con el mismo VO2max ganado, el tendón habría tenido 24h de alivio. La molestia del lunes era la señal — el cross-training es la respuesta correcta.
Las 3 modalidades más efectivas para el maratonista
Ventajas
- ✓0% carga de impacto: periostio, tendones y cartílago articulares descansan
- ✓Activación de cuádriceps y glúteos — músculos clave del km 30-42
- ✓Control exacto de intensidad con cadenciómetro (80-90 rpm = zona aeróbica)
- ✓Fácil de combinar con FC monitor: mismo cardiovascular, cero estrés estructural
Limitaciones
- !FC ~10-15 bpm MENOR que running al mismo ritmo percibido — ajustar zonas
- !Sin carga gravitacional específica del running (no sustituye la sensación del suelo)
- !Fija en casa no entrena el equilibrio ni la propioceptividad
Cómo hacerlo
45-90 min a 70-80% FCmax, cadencia 80-90 rpm. En subidas: sube la resistencia, no la cadencia. Primer día post-largo: 45-60 min suave (65-70% FCmax). Día de volumen alternativo: 75-90 min al 75-80% FCmax.
⏰ Cuándo en el plan
Día después del long run (activa sin impacto) · Día alterno entre intervalos y tempo · En Base como sesión de "volumen aeróbico" adicional
🔬 Base científica
Tanaka 1994: mismo VO2max ganado en 10 semanas. Lepers 2001: gasto cardíaco equivalente a running al mismo %VO2max.
Equivalencia de FC por modalidad
| Modalidad | Zona E running | Equivalencia | RPE equiv. |
|---|---|---|---|
| Running (referencia) | 65-74% FCmax | — | 5-6/10 |
| 🚴 Bicicleta | 55-64% FCmax | -10-15 bpm | 5-6/10 |
| 💧 Aqua jogging | 55-65% FCmax | -10-15 bpm + frío | 6/10 |
| ⚡ Elíptica | 60-69% FCmax | -5-8 bpm | 5.5-6/10 |
El agua enfría el cuerpo → la FC baja adicionalmente. Usar RPE como árbitro secundario si el medidor de FC no está disponible.
Cuándo aplicar · Plan de 16 semanas
En Base el volumen de running crece semana a semana — el riesgo de sobreuso acumula gradualmente. Añadir 1-2 sesiones de bici (45-75 min, Zona E) aumenta la carga aeróbica TOTAL sin subir el impacto acumulado en tendones y periostio. Alves 2020: en corredores >60 km/semana, 1-2 sesiones de bici/semana reduce lesiones de sobreuso en 50% sin perder adaptaciones. Ideal: bici el lunes (después del long run del domingo) y opcional el miércoles si el volumen de running es alto.
✓ El corredor que llegó a sem 6 con tendones frescos tiene más base para el tempo de Construcción que el que llegó con molestias.
Los 5 errores del corredor que hace cross-training
Regla de oro del cross-training
La bici del lunes no es descansó — es la razón por la que el tempo del miércoles sale bien. El corredor que llega a sem 14 con tendones frescos siempre supera al que llegó con molestias y "descansó" más.
Descubre tu arquetipo en #plan-nivel para recibir un protocolo de cross-training personalizado.
Base científica: Tanaka 1994 (J Strength Cond Res): cross-training = mismo VO2max que running en 10 semanas · Lepers et al. 2001 (Eur J Appl Physiol): gasto cardíaco equivalente cycling vs running al mismo %VO2max · Wilder & Brennan 1993 (J Orthop Sports Phys Ther): aqua jogging 95% VO2max equivalente · Alves et al. 2020 (Int J Sports Physiol Perform): -50% lesiones sobreuso con 1-2 sesiones bici/semana · Burnfield 2010 (J Orthop Sports Phys Ther): elíptica -30-45% peak loading en rodilla vs running · Saragiotto 2014 (Gait Posture): lesión por sobreuso = función de tiempo de impacto acumulado.
Entrenamiento de colinas
Colinas para el maratonista de ciudad plana
Speedwork in disguise: más reclutamiento de fibras IIa con menos estrés articular que el track
🚫
Mito extendido
"Las colinas son para trail runners o para quien tiene cuestas en su ruta — el maratonista de ciudad plana no las necesita."
✅
Evidencia
Billat et al. 2003 (J Sports Sci): 6 semanas de repeticiones en cuesta → economía de carrera +5.6% vs intervalos planos al mismo RPE. Sloniger et al. 1997 (J Appl Physiol): pendiente 7.5% → +24% reclutamiento de gastrocnemio + +11% cuádriceps vs running plano a la misma velocidad — fibras IIa que el long run fácil no activa. Noakes 2003 (Lore of Running): misma zona de VO2max que los intervalos con 30-40% menos estrés articular — la cuesta reduce la velocidad horizontal sin reducir la intensidad cardiovascular. Moore et al. 2012 (Eur J Appl Physiol): bajadas -4% → daño muscular (CK, LDH) equivalente al km 35-42 real — entrena la resistencia excéntrica antes de necesitarla.
+5.6%
economía de carrera
Billat 2003
+24%
reclutamiento IIa
Sloniger 1997
−40%
estrés articular
vs intervalos planos
3 tipos de trabajo en cuesta
Pendiente
6-8%
Duración/rep
15-30 seg por rep
Repeticiones
8-12 reps
Recuperación
Caminar bajando (~60-90 seg)
Cuándo → Después de rodaje fácil · 1×/semana en Base
Objetivo → Activar fibras IIa sin velocidad de sprint — mismo efecto que strides pero con mayor reclutamiento muscular
Transferencia al maratón → El arrancón del km 38-40 cuando el glucógeno baja — las fibras IIa entrenadas en cuesta responden cuando el motor aeróbico falla
Usar pendiente >10%: pierde el patrón de zancada específico del maratón y se convierte en senderismo
Sloniger 1997: +24% gastrocnemioBillat 2003: economía +5.6%
🏙️
Si tu ciudad es plana: 4 alternativas reales
Plan de 16 semanas — cuándo y qué tipo
Sesiones → 1×/semana (martes o jueves)
Contenido → Solo cuestas cortas · 6-8 rep × 20 seg · pendiente 6-8% · añadir bajadas sem 1-4
Por qué → Los tendones y periostio necesitan 6-8 semanas de adaptación antes de intensidad — cuestas cortas son el estímulo más seguro
Protocolo de sesión (cuestas cortas)
1
🏃Calentamiento: 10-15 min de trote suave en plano (Zona E)
2
⚡Activación: 4 strides cortos de 8-10 seg en plano
3
🏔️Ejecución: sube la cuesta en 15-30 seg a esfuerzo fuerte (RPE 8/10) — forma: inclinación hacia adelante desde los tobillos, no desde la cadera
4
🚶Recuperación: camina de vuelta (no trotes) — mínimo 60-90 seg
5
🔄Repite 8-12 veces · Si pierdes la forma, para — la última rep debe verse igual que la primera
6
🌿Vuelta a la calma: 5-10 min de trote muy suave en plano
Los 5 errores del corredor que empieza con colinas
Regla de oro
Si la última repetición se ve distorsionada comparada con la primera (zancada más corta, cadera que cae, brazos cruzando la línea media), la sesión terminó — no importa cuántas reps faltan. Las colinas entrenan el patrón neuromuscular, no la resistencia al caos.
Tip personalizado según tu arquetipo McMillan:
Speedster ⚡
Tus fibras IIa ya están desarrolladas por velocidad — el mayor ROI de las colinas está en las BAJADAS excéntricas (sem 1-4 de Base): cuádriceps que no fallan en km 32. Para las cuestas cortas, basta con 6-8 rep × 15 seg; más es sobreestimulación en tu perfil fisiológico.
Endurance Monster 🔥
Tu gap es la capacidad de VO2max — las CUESTAS LARGAS (60-90 seg × 4-5 rep) son tu herramienta de Construcción más valiosa: misma zona que Yasso 800s con menor riesgo de lesión. Úsalas en semanas alternas con Yasso. Las cuestas cortas antes del rodaje fácil de martes (6 rep × 20 seg) añaden el estímulo neuromuscular que el long run no da.
Combo Runner ⚖️
Protocolo estándar: cuestas cortas en Base (martes, 8 rep × 20 seg post-rodaje fácil), cuestas largas alternando con Yasso en Construcción (sem pares: colinas, sem nones: Yasso). Tu perfil equilibrado tolera bien ambos tipos sin sesgar el entrenamiento.
→ Descubre tu arquetipo en #plan-nivel
Base científica
• Billat et al. 2003 (J Sports Sci): economía de carrera +5.6% con colinas vs intervalos planos al mismo RPE en 6 semanas
• Sloniger et al. 1997 (J Appl Physiol): pendiente 7.5% → reclutamiento gastrocnemio +24% y cuádriceps +11%
• Noakes 2003 (Lore of Running, 4ª ed.): "speedwork in disguise" — 30-40% menos estrés articular vs intervalos planos a mismo VO2max
• Moore et al. 2012 (Eur J Appl Physiol): downhill -4% → CK/LDH equivalente a km 35-42 del maratón
• Hartmann et al. 2015 (IJSPP): regla 48h entre calidades — aplica a colinas largas igual que a Yasso/Tempo
organizing a marathon?
your race deserves its own page.
A page with goal-time corrals, elevation profile, chip timing and finisher certificate; registrations without abusive fees and results that feed your runners' passport — so they come back every edition.
