How to test your nutrition before a race
The biggest mistake in endurance nutrition is discovering your strategy on race day. Gels, drinks, caffeine, timing, amounts: it all needs to be rehearsed in training, in conditions as close as possible to competition. Well tested, your nutrition becomes a reassuring routine; improvised, it's the leading risk of underperformance. Here's a simple method to test effectively.
What to test
Test everything you'll use in the race: gel brands and flavours, your drink concentration, your carbs per hour, your fluid volume, your sodium, and any caffeine use. Also reproduce the real timing — first intake, interval between doses — not just the products. The goal is to validate both digestive tolerance and logistics (reaching your gels, managing your flasks).
When and how to test
Long runs and race-pace sessions are your best test benches: same time of day, same intensity, same kit as race day. Change one thing at a time so you know what works and what doesn't. Start early in your build-up, several weeks before the goal, to have time to adjust and train your gut for higher intakes.
Practical checklist
- Same products, concentration and timing as the race
- Tests on long runs and at race pace
- One change at a time
- Pre-race meal validated, not just the effort
- Testing started several weeks before the goal
Common mistakes
- Testing new products on race day
- Changing several variables at once with no way to isolate the cause
- Only testing on easy runs, never at race pace
- Waiting until the final weeks to start testing
- Forgetting to test the pre-race meal, not just the during-effort intake
FAQ
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