Fueling
Eat to support the work. Not to perform it.Fueling for training is simpler than most runners make it. The goal is to arrive at hard sessions with enough energy to execute them, and to replenish after to support adaptation. Most of the complexity in fueling advice does not apply to athletes running five to seven hours per week.
Easy Run
No fueling needed during the run. Easy effort is aerobic and draws on fat stores efficiently. Running fasted in the morning is fine for most easy sessions.
Under 75 minutes at easy effort — nothing needed mid-run.
Threshold
Arrive fueled. A threshold session on an empty stomach typically degrades quality in the later reps. Oatmeal, toast with eggs, or rice and eggs all work as a pre-session meal.
Timing — Eat two to three hours before the session when possible. If running early, a small carbohydrate (banana, toast, or similar) is enough to stabilize rhythm.
No fueling needed mid-session for most threshold formats (under 60 min of work).
Long Run
Long runs over 75–90 minutes benefit from carbohydrate during the run. Start fueling early — before hunger — at roughly 45–60 minute intervals. Gels, chews, or real food all work if practiced consistently.
20–30g of carbohydrate per 30–45 minutes is a useful working range for most runners.
Race Day
Race fueling should be practiced during long runs, not improvised on race day. Use what works in training. For half marathon and longer, fueling mid-race is necessary for most runners.
Nothing new on race day.
Eating within 30–60 minutes after a hard session supports glycogen replenishment and tissue repair. A combination of carbohydrate and protein works well — this does not need to be precise or elaborate. Rice and eggs, yogurt with fruit, a sandwich, or leftovers from the previous meal are all sufficient.
After easy runs, regular meal timing is sufficient. The body's repair needs are low.
- Hydration Dehydration degrades performance faster than underfueling. Consistent daily fluid intake matters more than aggressive pre-run loading. In heat, salt loss becomes relevant for runs over an hour.
- Consistency over optimization Eating well most of the time matters more than precise fueling windows. Chronic underfueling — not enough to support training load — is more damaging than imperfect timing.
- Gut training The gut can be trained to tolerate fueling during running. If gels cause discomfort, practice consistently with small amounts before increasing. Race day is not the time to trial new products.
- Coffee Caffeine taken 45–60 minutes before a threshold session or race is one of the most consistently supported performance aids. Use what the stomach tolerates.