Half Marathon Race-Day Fuelling Plan for India (2026 Season)
A kilometre-by-kilometre fuelling plan for Indian half marathons — gels, sodium, and the pre-race meal that will not wreck your stomach.
Half marathon race-day fuelling plan for India (2026 season)
A half marathon race-day fuelling plan is the difference between running your last 5 km and surviving them. Most Indian half marathons — Delhi in October, Bengaluru and Hyderabad through the winter, Mumbai in January — start warm and humid, which changes the maths on both carbohydrate and sodium. This is a practical plan you can rehearse in training and follow on the day.
General guidance for healthy adult runners, not medical or dietary advice. If you have a medical condition or take regular medication, speak to a doctor or a registered sports dietitian before changing your race nutrition.
The three numbers that matter
- Carbohydrate: 30–60 g per hour. Most gels supply 20–30 g each, so that is two to three servings per hour, depending on your pace.
- Sodium: 300–600 mg per hour in warm or humid conditions. Heavy or salty sweaters — you know who you are from the white marks on your cap — sit at the top of that range or above.
- Fluid: roughly 400–800 ml per hour, taken in small amounts at every aid station rather than in two big gulps.
A 1:45 to 2:15 half marathon therefore needs roughly two to four gels and steady electrolyte intake. Anything under about 75 minutes, and one gel plus water is usually enough.
What to eat before a half marathon
Three days out: nothing exotic. Keep your normal diet, slightly higher in carbohydrate, and stop experimenting with new foods.
The night before: a familiar carbohydrate-heavy meal — rice and dal, khichdi, pasta, idli. Avoid very high-fibre and very oily food, which slows gastric emptying and is the usual cause of race-morning stomach trouble.
Three hours before the gun: 1.5–2.5 g of carbohydrate per kg of body weight. For a 65 kg runner that is roughly 100–160 g — two bananas plus toast and honey, or a bowl of poha with a fruit, or three idlis with a little jaggery. Sip 400–600 ml of fluid with electrolytes across this window.
Fifteen minutes before: optional single gel with a few sips of water, if you have practised it.
The in-race plan, kilometre by kilometre
| Point | Action |
|---|---|
| Start to 5 km | Water only, a few sips at each station. Do not chase early thirst with volume. |
| ~6 km | Gel one, with water. Never with a sports drink — that concentration is what causes cramping and nausea. |
| 8–12 km | Electrolyte drink at stations. This is where sodium starts to matter in Indian humidity. |
| ~12 km | Gel two, with water. |
| ~17 km | Gel three if the race is going long or conditions are severe. |
| Last 3 km | Water to comfort only. Nothing new. |
The one non-negotiable rule: take every gel with plain water, not with a sports drink. Gels are already concentrated, and stacking two carbohydrate sources is the most common cause of race-day GI distress.
Hydration in Indian conditions
Humidity is the variable that catches out runners who trained through a cool December morning and then raced a warm one. Sweat rate rises but evaporative cooling falls, so you lose more fluid and salt for the same effort.
Two practical steps. Weigh yourself before and after a long training run to estimate your sweat rate — every kilogram lost is roughly a litre of fluid. And carry your own electrolyte mix if you know the race is only serving plain water; a small soft flask or bottle is easier than gambling on aid-station stock.
Practise everything in training
The gel you have never tried is the gel that will disagree with you at 15 km. Use your two longest training runs as full dress rehearsals: same breakfast, same timing, same gels, same electrolyte mix, same bottle. If something goes wrong there, you have weeks to fix it.
Shop the gear
- Unived Elite Hydration Mix — ₹600. Race-day electrolyte mix.
- Unived Daily Hydration — ₹600. For the training block and the days before the race.
- Unived BCAA + Hydration Mix — ₹1,200. For long runs in the build-up.
- Puma Swift Water Bottle — ₹629. For carrying your own mix on training runs.
Related reading
- Sports nutrition for endurance athletes in India: gels, bars and electrolytes explained
- October race season in India: a half-marathon gear countdown (2026)
- Half marathon fever in India: a first-timer gear guide
Frequently asked questions
How many gels do you need for a half marathon?
Two to three gels covers most runners finishing between 1:45 and 2:15, based on 30–60 g of carbohydrate per hour with each gel supplying 20–30 g. Runners finishing under about 75 minutes often need only one, and anyone over 2:30 should plan for three or four.
What should I eat 3 hours before a half marathon?
Aim for roughly 1.5–2.5 g of carbohydrate per kg of body weight from familiar, low-fibre, low-fat food — poha, idli, toast with honey, or bananas. For a 65 kg runner that is about 100–160 g of carbohydrate, with 400–600 ml of fluid sipped across the window.
How much electrolyte do I need in humid Indian races?
Plan for 300–600 mg of sodium per hour in warm and humid conditions, taken through an electrolyte drink or tablets rather than gels alone. Heavy sweaters may need more; the way to find out is to weigh yourself before and after long training runs and adjust.
