What is the main consequence of inadequate carbohydrate intake for athletes?

Inadequate carbohydrate intake for athletes primarily results in decreased energy levels. Carbohydrates are a key source of energy for athletes, particularly during high-intensity exercise and endurance activities. When carbohydrate stores, such as glycogen in muscles and liver, are depleted, athletes may experience fatigue, reduced performance, and an overall lack of energy. This is because carbohydrates play a crucial role in fueling both aerobic and anaerobic activities.

When energy levels drop, athletes may find it challenging to maintain optimal performance, leading to early onset of fatigue and a struggle to complete their training or competition effectively. Therefore, ensuring sufficient carbohydrate intake is critical for sustaining energy, supporting longer workout durations, and maximizing athletic performance.

The other options relate to effects that are not primarily driven by carbohydrate intake. Increased muscle mass typically relies on adequate protein and caloric intake, while improved endurance capacity and enhanced focus are also influenced by a range of nutritional, psychological, and training factors, rather than being directly tied to carbohydrate deficiency.