How much to eat and drink in a race, how to avoid gut trouble and train your gut — plus the basics of recovery afterwards.
How much do you need to eat and drink in a triathlon? Honest answer: for a sprint, water and maybe a gel is usually enough, and the longer the race, the more carbohydrate you need — roughly 30–60 grams per hour, plus sodium and enough fluid in the heat. More important than the perfect number is that your stomach plays along.
Because this is the real crux. Gastrointestinal complaints are the most common "illness" in triathletes and appear in 7 to 70% of athletes in studies. The good news: your gut is trainable. You tolerate a single carbohydrate source up to about 60 grams per hour, and even more with a glucose-fructose mix — because your body up-regulates absorption when you practise it regularly. This guide shows you how much really makes sense, how to avoid GI trouble and how to recover smartly afterwards.
Short races need little, long ones a lot. As a rough frame: around 30–60 grams of carbohydrate per hour, with the higher values for long distances. For a sprint under an hour you can often manage on water. The longer it lasts, the more important intake on the bike becomes, where eating is easiest.
Up to about 60 grams per hour a single source like glucose is enough. To go above that you need a mix of glucose and fructose — so-called multiple transportable carbohydrates. The reason: they use different transport routes in the gut, get through better and are usually tolerated better. For most sprint and olympic distances, though, you stay under the 60-gram mark.
Fluid is best managed actively. In long efforts and heat, aim for around 450–750 millilitres per hour, and beyond a certain duration and warmth sodium belongs with it to prevent hyponatremia — a dangerous sodium deficiency from drinking plain water. For short races this is less critical, but you should have a basic feel for drinking.
The most important sentence in this guide: practise every fuel in training, never for the first time in a race. Your gut adapts — carbohydrate absorption capacity can be up-regulated, which clearly lowers GI complaints. Take your planned race fuel during long sessions, then on race day you know exactly what your stomach handles.
After hard or long sessions, a simple mix of carbohydrates and some protein helps your body refill stores and repair muscle. Combined with sleep and enough fluid, that's the core of any recovery. No miracle products needed — consistency beats expensive powders.
Turn your longest training day into a nutrition dress rehearsal: eat and drink exactly what you plan for the race, in the same amounts and intervals. Note honestly afterwards how your stomach reacted. That single session tells you more about your race nutrition than any table — and turns a guessing game into a tested plan. What works in the dress rehearsal works in the race.
It depends on duration: roughly 30–60 grams per hour, with the higher values for long distances. For a sprint under an hour, water is often enough. To go above 60 grams you need a glucose-fructose mix, because a single source is only well absorbed up to about 60 grams.
Train your gut and test everything beforehand. GI complaints are the most common illness in triathletes, but absorption capacity can be up-regulated through regular practice. Never take unfamiliar gels in a race, scale the amount to duration, and practise fuelling in long sessions under race conditions.
In a cool sprint, barely. Sodium only becomes critical in longer efforts and heat: then it prevents hyponatremia, a dangerous sodium deficiency from drinking plain water. For long distances and hot race days an electrolyte source belongs in your plan; for short races it's usually unnecessary.
A simple combination of carbohydrates and some protein refills stores and supports muscle repair. Together with sleep and enough fluid, that's the core of recovery. You don't need expensive special products — a normal, balanced meal serves the same purpose.
Triathlon: Strategy and Tactics