Race-week taper and nutrition checklist for marathon and triathlon: the 7-day protocol elite coaches use to peak on race day

The taper is the most misunderstood phase in endurance training. Most athletes either reduce too little (arriving fatigued) or reduce too much (arriving flat and anxious). The research consensus across marathon and triathlon literature is remarkably specific: reduce volume by 40–60% while maintaining intensity and frequency. That means fewer total kilometres but the same number of sessions, with short race-pace efforts preserved to keep neuromuscular sharpness alive.

Day 7 (Sunday before a Sunday race): final long-ish run or ride, but 30–40% shorter than peak training. Marathon runners: 60–75 minutes with 10 minutes at marathon pace. Triathletes: a 90-minute combined session at moderate effort. This is the last meaningful training stimulus. Nutrition: normal balanced meals. Begin increasing carbohydrate share slightly — from roughly 50% to 55–60% of total calories. Hydration: baseline, no loading yet.

Day 6 (Monday): easy 30–40 minute session. Runners: easy jog with 4×20-second strides at 5K pace. Cyclists: 45 minutes Zone 2 with 3×30-second spin-ups. This preserves neuromuscular activation without creating fatigue. Nutrition: continue gradual carb increase. Aim for 7–8 g of carbohydrate per kg of body weight. For a 70 kg runner, that is 490–560 g of carbs — rice, pasta, bread, oats, potatoes, fruit. Spread across 4–5 meals to avoid GI distress.

Day 5 (Tuesday): 25–30 minute easy session with 2–3 short race-pace pickups (60–90 seconds each). Purpose: mechanical rehearsal without metabolic cost. Nutrition: same carb target (7–8 g/kg). Begin reducing fibre intake slightly — less raw vegetables, fewer whole grains — to minimise gut volume on race morning. This is when many athletes make the mistake of trying new foods or supplements. Nothing new this week. Ever.

Day 4 (Wednesday): rest day or 20-minute very easy movement (walk, yoga, light spin). Sleep is the priority. Nutrition: carb loading peaks today and tomorrow at 8–10 g/kg. For a 70 kg athlete: 560–700 g of carbs. This sounds enormous, but spread across 5 meals with calorie-dense sources (white rice, pancakes, jam, sports drinks, dried fruit) it is manageable. Fat and protein intake naturally decrease to make caloric room. Hydration: add 500 ml above normal daily intake, with a pinch of sodium.

Day 3 (Thursday): 20–25 minute easy session with 3×30-second race-pace efforts. Last quality touchpoint. Garmin Body Battery should be climbing above 70 by now — if it is still below 60, the taper started too late or life stress is interfering. Adjust race-day expectations accordingly. Nutrition: continue 8–10 g/kg carbs. Last opportunity for a slightly larger meal. From tomorrow, shift to smaller, more frequent meals.

Day 2 (Friday): 15–20 minute jog or spin, purely mechanical. Some athletes prefer full rest. Either is fine — what matters is zero fatigue accumulation. Nutrition: reduce meal volume. Same carb target but through frequent small meals and snacks. Reduce fibre further. Last coffee-containing meal should be no later than early afternoon to protect sleep. Hydration: sip consistently, urine should be pale straw. Avoid over-hydrating (dilutional hyponatremia risk).

Day 1 (Saturday — race eve): optional 10-minute shakeout jog with 2×15-second strides. Many elites do this; many skip it. Personal preference. Lay out all race gear. Check weather forecast and adjust clothing. Pin your bib. Charge your Garmin. Pre-load your race on the watch if using PacePro or course navigation. Nutrition: early dinner, familiar foods, moderate portion. White rice with chicken or fish is the classic — low fibre, high glycaemic carb, moderate protein. No alcohol. No heavy sauces. In bed by 21:30–22:00. Accept that sleep may be light — this is normal and does not affect performance. The sleep two nights before (Thursday) matters more.

Race morning protocol: wake 3–3.5 hours before gun time. Breakfast: 1–2 g/kg of easily digestible carbs — white toast with honey, a banana, a small bowl of white rice, or a familiar sports bar. Coffee if habitual (150–200 mg caffeine, roughly one strong cup). Sip 400–500 ml of water or electrolyte drink between waking and 45 minutes before start. Stop drinking 30–45 minutes out to allow bladder to empty. Final gel or sports drink 15 minutes before start if race is longer than 90 minutes.

Race fuelling strategy: for events over 60 minutes, aim for 60–90 g of carbs per hour from a mix of glucose and fructose (2:1 ratio). This is the single biggest performance lever most age-group athletes underutilise. Practice this in training — gut trainability is real and takes 4–6 weeks to adapt. Gels every 20–25 minutes, supplemented by sports drink at aid stations. For marathon: start fuelling at km 5, not when you feel you need it. By the time you feel glycogen depletion, you are already 20–30 minutes behind on fuelling.

Common taper mistakes. Over-resting: complete inactivity for 4+ days leaves athletes feeling sluggish and heavy. Keep daily easy movement. Panic training: a bad session on Tuesday does not mean fitness has disappeared — it means fatigue has not fully dissipated. Trust the process. Fibre bombs: a huge salad the night before the race guarantees GI issues at km 30. Reduce fibre progressively from Day 5. New gear or nutrition: race week is not the time to try new shoes, a new gel brand, or a caffeine supplement you have never tested. Nothing new on race day is the oldest rule in endurance sport for good reason.

The Garmin taper dashboard. During race week, three Garmin metrics tell you if the taper is working. Training Status should shift from Productive to Peaking — this means acute load has dropped while fitness (VO2max estimate) remains stable. Body Battery should trend upward, ideally above 75 by race eve. HRV Status should be balanced or above baseline. If Training Status shows Detraining, you tapered too aggressively. If it still shows Strained, you did not reduce enough. At CoachUpFit, we monitor these signals daily during race week and make micro-adjustments to session volume if the taper is not tracking as expected.