Carbohydrates have been unfairly demonised in mainstream nutrition culture, with low-carb and ketogenic diets receiving disproportionate attention relative to their suitability for most athletic populations. For athletes performing moderate-to-high intensity exercise, carbohydrates are not optional - they are the primary and often rate-limiting fuel source for performance.
Glucose (derived from carbohydrates) is the only fuel source the brain can use directly and the primary fuel for glycolytic energy production (the dominant pathway for most resistance training and moderate-to-high intensity cardio). Muscle glycogen (glucose stored in muscle) provides the fuel for explosive, high-intensity work. When glycogen is depleted, performance at high intensities becomes impossible. This is "hitting the wall" in endurance sports and the progressive performance decline in strength athletes who train low-carb.
Carbohydrate requirements for athletes vary with training volume and intensity: recreational athletes (3-5 hours of moderate training per week) need 3-5g per kilogram of body weight daily. Endurance athletes (5-10+ hours per week) need 5-8g per kilogram. The timing of carbohydrate intake around training matters: consuming carbohydrates 1-4 hours before training (glycogen loading) and within 2 hours after training (glycogen replenishment) optimises performance and recovery. Best carbohydrate sources for athletes: oats, rice, sweet potato, fruit, whole grain bread, quinoa, and legumes. Prioritise these before processed and refined options.