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Training nutrition is simpler than the supplement industry wants it to be: it is mostly timing and totals. A day of decent meals fuels a session better than any single pre-workout product, and the three moments that genuinely matter are the meal before a hard session, fuel during any session over about 90 minutes, and a real meal afterwards. Carbohydrate is the honest performance fuel — muscles run on stored glycogen — and protein is about the day rather than the minute: research finds total daily protein spread across meals matters more than the precise post-training window, with roughly 1.2 to 2.0 grams per kilogram of body weight a day covering most athletes. This guide gives the practical version of all of it, plus the food-first rule on supplements: the short list with honest evidence is caffeine for performance and creatine for strength work, and both work alongside food, not instead of it.
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Plain-English nutrition for training — how to fuel before, during and after sessions, why protein timing matters less than daily totals, and the honest food-first approach that beats supplements for most athletes.
Why it matters
Training nutrition is mostly timing and totals: a day of decent meals fuels a session better than any single pre-workout product, and the three moments that matter most are the meal before a hard session, something during sessions over about 90 minutes, and a real meal afterwards.
Carbohydrate is the honest performance fuel: muscles run on stored glycogen, so a hard session deserves a meal with real carbs in the hours before it, and a long session (over about 90 minutes) deserves carbs during it — sports drinks, gels, bananas or dried fruit all work.
Protein is about the day, not the minute: research finds total daily protein spread across meals matters more than the precise '30-minute window' after training — roughly 1.2-2.0 grams per kilogram of body weight a day covers most athletes, with more during hard build blocks.
Food first, supplements second: most athletes need no supplements beyond what a normal varied diet provides — the products with the honest evidence (caffeine for performance, creatine for strength work) work alongside food, not instead of it.
This is general guidance, not dietary or medical advice: medical conditions, allergies and real dietary needs are for a qualified professional, and 'eat like an athlete' never means copying a professional's plan.
Your checklist
Build training days around real meals: carbs before hard sessions, protein and vegetables with every main meal, food after training rather than waiting hours.
For sessions over about 90 minutes, take fuel with you — drinks, gels, bananas or dried fruit every 20-30 minutes.
Aim for roughly 1.2-2.0 grams of protein per kilogram of body weight a day, spread across meals — chicken, fish, eggs, dairy, beans and lentils all count.
Eat a proper meal within a couple of hours of hard sessions — protein plus carbs — rather than a token snack.
Practise race-day nutrition in training: never try a new gel, drink or pre-race meal on race morning.
Treat supplements as the exception, and only ones with honest evidence — caffeine and creatine are the short list — after food is right.
If you have a medical condition, an eating disorder history or specific dietary needs, work with a qualified professional rather than a calculator.
❓ Training Nutrition Basics: Fuel the Work You Do — FAQ
What should I eat before a hard session?
Real carbohydrates in the hours before — the muscles run on stored glycogen, so the pre-session meal is the performance meal. Practise whatever you plan to eat before races in training; race morning is never the day to try a new food.
How much protein do athletes need?
Roughly 1.2 to 2.0 grams per kilogram of body weight a day for most athletes, spread across meals rather than crammed into one post-training shake. Chicken, fish, eggs, dairy, beans and lentils all count — supplements are rarely necessary.
Do I need supplements?
Most athletes need none beyond a normal varied diet. The two with honest evidence are caffeine (for performance) and creatine (for strength work) — and both work alongside food, not instead of it. If you have a medical condition or specific dietary needs, work with a qualified professional.
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