We prepare a interval training session on Tuesday evenings, follow it up with a long run on the weekend, and in between, we eat whatever comes to hand. The results come quickly: heavy legs, prolonged recovery, stagnation in progress. Sports nutrition is not just a theoretical supplement reserved for sponsored athletes. It is a concrete lever that conditions the quality of each training session and the body’s ability to adapt to the load.
Adjusting carbohydrates to the actual training volume
Most guides recommend eating carbohydrates before exercise. The problem is that they almost never specify the amount based on the actual volume of the week. A person who runs three times a week does not have the same needs as a trail runner who accumulates over ten hours of training weekly.
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In practice, carbohydrates should be dosed according to the duration and intensity of the sessions. For a moderate effort lasting an hour, a regular meal based on rice or pasta consumed two to three hours beforehand is sufficient. When sessions exceed ninety minutes or include high-intensity work, the portion of starchy foods in the preceding meals should be increased, not just the last one.
Detailed resources on this topic can be found on the L’Esprit du Sport website, which addresses nutrition in direct relation to daily practice.
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The classic mistake is to overload on carbohydrates on rest days under the pretext of “building reserves.” On off days, the body does not need the same intake. Slightly reducing starchy foods on those days and increasing vegetables helps manage weight better without sacrificing the energy available for the next session.
Proteins and muscle recovery: the real window of opportunity
It is often said that one must consume protein within thirty minutes after exercise, or risk “wasting” the session. This ultra-short anabolic window has been questioned for several years. What matters more is the total amount of protein spread throughout the day.
A regular athlete needs a higher protein intake than a sedentary person. Animal sources (chicken, eggs, fish) remain the most complete in amino acids, but plant combinations (legumes and grains) also work, provided there is variety.
- At breakfast, include eggs or plain yogurt instead of sugary cereals, which provide almost no useful protein for muscle repair.
- At the post-workout meal, aim for a portion of protein equivalent to the size of the palm of your hand, accompanied by carbohydrates to facilitate absorption.
- For snacks, prefer almonds or a mix of dried fruits and seeds, which combine proteins, fats, and minerals without requiring preparation.
Feedback varies on the necessity of adding protein supplements (whey, casein). For most amateur athletes, a varied diet largely meets their needs. Supplements become relevant when training volume is very high or when logistical constraints prevent proper eating after exercise.
Precision nutrition: beyond generic advice
The underlying trend in sports nutrition is personalization. Medical teams in combat sports now use regular blood tests and microbiome analyses to adjust supplementation to each athlete’s individual profile. This approach is beginning to spread among ambitious amateur athletes.
A periodic blood test identifies real deficiencies before they hinder performance. Iron, for example, is often low in endurance female runners, but it is only noticed when fatigue sets in permanently. The same goes for vitamin D in winter, which affects bone health and muscle function.
Precision nutrition also takes into account age and hormonal variations. The menstrual cycle alters energy needs and carbohydrate tolerance depending on the phases. Adjusting intake based on these fluctuations is not anecdotal: it can change the quality of sessions and recovery over an entire month.
Hydration and electrolytes during prolonged effort
Drinking water is not always enough. During efforts exceeding one hour, especially in hot weather, sodium and potassium loss degrades muscle contraction and alertness. Cramps are just a late symptom.
A simple solution: add a pinch of salt and a bit of lemon juice to your water bottle for long outings. Commercial sports drinks work, but many contain excess sugars that cause digestive issues during exercise. Checking the composition before purchasing remains the best reflex.
Hydration is not managed only during the session. Starting well-hydrated conditions the entire effort. Check the color of your urine in the morning: if it is dark, the deficit is already established before even putting on your running shoes.
Dietary supplements for athletes: sorting marketing from reality
The market for sports supplements is experiencing significant growth, with offerings ranging from well-documented creatine to plant-based formulas without solid evidence. In practice, three supplements frequently receive positive feedback from users:
- Creatine monohydrate, which improves performance in short, repeated efforts (weight training, sprinting). Its effectiveness is well documented.
- Caffeine, which increases alertness and delays the perception of fatigue, provided that moderate doses are not exceeded.
- Omega-3s (fish oil), which help limit post-exercise inflammation and promote joint recovery.
For the rest, caution is advised. A supplement never corrects an unbalanced diet. It is better to invest in quality foods than in capsules that promise spectacular results without foundation.
Effective sports nutrition is based on three practical axes: adjusting carbohydrates to the actual training volume, spreading protein intake throughout the day rather than chasing a magic window, and personalizing intake through regular assessments. The rest is consistency on the plate, session after session.