Triathlon Race-Week Nutrition: Day-by-Day Plan (2026)
Exactly what to eat in the 7 days before your triathlon — carb-loading, hydration, sodium, and the foods to avoid. Beginner-friendly day-by-day plan.
By Lotte
Race-week nutrition is simpler than the internet makes it sound. You're doing three things: topping up glycogen with carbs, hydrating with sodium, and avoiding any food that could upset your gut. This guide gives you a day-by-day plan from Sunday to race-morning.
Key takeaways
- 1Start mild carb-loading 48–72 hours out, not the whole week
- 2Aim for 7–10 g carbs per kg body weight on the 1–2 days before race day
- 3Add 500–1000 mg extra sodium per day in the last 48 hours
- 4Nothing new — eat foods you've already tested in long training sessions
- 5Race-morning breakfast: 2–3 hours before, 100–150 g carbs, low fiber, low fat
In this article
Quick answer: what should I eat race week?
7 days out: Eat normally. Slightly more carbs as training tapers.
3 days out: Increase carbs to ~60% of calories. Cut high-fiber, high-fat, and any unfamiliar foods.
1–2 days out: Carb-load — 7–10 g carbs per kg body weight per day. Add salt to meals.
Race morning: 2–3 hours before, eat 100–150 g of easy carbs (oatmeal, toast, banana, sports drink). Sip 500 ml water with electrolytes.
Use the race nutrition calculator for personalized numbers.
Day 7 to Day 4: Normal eating, lighter training
Your training volume drops in taper week, so calorie needs drop slightly too. Don't overcorrect — undereating now wrecks recovery from the taper.
- Keep meals balanced: carbs + protein + a little fat + veg
- Hydrate to pale yellow urine
- Avoid alcohol from at least 4 days out (it sabotages sleep and glycogen)
- Don't experiment with new foods, supplements, or restaurants
This is also the week to lock in your race-day fueling plan — see race nutrition fundamentals.
Day 3 and 2: Start the carb push
Now you actively top up muscle glycogen. Target ~60% of calories from carbs.
Good carb sources:
- White rice, pasta, white potatoes
- Bread, bagels, oats
- Bananas, raisins, dates
- Sports drinks, fruit juice
- Pretzels, rice cakes
Cut back on:
- High-fiber foods (whole grains in large quantity, raw broccoli, beans)
- Heavy fats (cream, fried food)
- Spicy food if you're sensitive
- New protein sources
Fiber is your friend 51 weeks of the year and your enemy on race week. A loaded gut = a slower swim and bike.
Day 1 (day before): Carb-load + sodium
Target: 7–10 g of carbs per kg of body weight across the day. A 70 kg athlete = 490–700 g of carbs.
That's a lot. Spread it across 5–6 meals/snacks. Liquid carbs (juice, sports drinks) help if you can't eat that much solid food.
Sample 70 kg day:
- Breakfast: 2 bagels + jam + banana + juice (~150 g carbs)
- Snack: 2 rice cakes + honey + sports drink (~80 g)
- Lunch: large bowl pasta + tomato sauce + chicken + bread (~150 g)
- Snack: banana + pretzels + 500 ml sports drink (~100 g)
- Dinner: rice + lean protein + cooked veg + bread (~150 g)
- Evening: small bowl cereal with milk (~50 g)
Sodium: Add salt liberally. Soup, pretzels, electrolyte drinks all count. Target +500–1000 mg extra vs normal.
Hydrate to pale-yellow urine but stop fluids 2 hours before bed.
Race morning
3 hours before the start: Eat 100–150 g of easy carbs.
- Oatmeal with banana and honey
- 2 slices toast + jam + banana
- Bagel with honey + sports drink
- Rice with a little salt (for sprint/Olympic later starts)
Sip 500 ml of water + electrolyte tab between then and 30 min before start.
30–15 min before swim: Optional — small gel or 200 ml sports drink. Test in training first.
Stop drinking 30 min before start to avoid an emergency bathroom break in the swim.
Full breakdown in race morning routine hour-by-hour.
Foods to absolutely avoid race week
- Sushi, raw shellfish, rare meat (food-poisoning risk = race-ending)
- New restaurants, especially the night before
- Heavy creamy/cheesy dishes
- Excessive raw fiber (huge salads, beans)
- Alcohol (4+ days out)
- New supplements, gels, drinks you haven't trained with
- Spicy curries, hot sauces, if you're not used to them
The golden rule: if you wouldn't eat it before a hard 3-hour training session, don't eat it race week.
Race week day-by-day
| Day | Carbs target | Key actions |
|---|---|---|
| 7 to 4 days out | Normal (5–7 g/kg) | Eat clean, hydrate, no alcohol |
| 3 days out | ~6–7 g/kg, lower fiber | Cut fiber/fat, no new foods |
| 2 days out | 7–8 g/kg | Active carb-loading, +sodium |
| 1 day out | 8–10 g/kg | 5–6 small meals, hydrate, early bed |
| Race morning | 100–150 g (3 hr pre) | Tested breakfast, electrolytes |
Recommended gear
Affiliate disclosure: Brick to Brick may earn a commission from qualifying purchases, at no extra cost to you. Unless a named method says otherwise, these are research-based recommendations rather than first-hand product tests.
Maurten Drink Mix 320
High-carb pre-race drink, gentle on gut, 80g carbs per serving
View on AmazonPrecision Hydration PH 1500 tabs
High-sodium electrolyte tabs for the 48 hours before a hot race
View on AmazonSiS GO Energy gels
Isotonic gels — no water needed, easy on the stomach
View on AmazonSources
Sources are listed so readers can verify consequential claims and dated details.
- Burke et al. — Nutrition for endurance sports: marathon, triathlon and road cycling — Journal of Sports Sciences (2011) (accessed August 24, 2026)
Frequently asked questions
Do I really need to carb-load for a sprint triathlon?
Not as much. Sprint races (<2 hours) don't deplete glycogen the way long-course does. Eat normally with slightly more carbs on race day — skip the heavy 2-day carb-load.
I always get GI issues on race morning — what do I do?
Eat earlier (3.5–4 hours pre-race), reduce fiber 48 hours out, and rehearse the exact breakfast in training. Coffee timing matters too — test it.
Should I carb-load with sugar or starches?
Mostly starches (pasta, rice, bread, oats) — sugar in large amounts upsets most guts. A sports drink between meals adds liquid carbs without the bloat.
Will carb-loading make me gain weight?
Yes — about 1–2 kg of glycogen + water. That's your fuel tank, not fat. It comes off race day.