What is a potential consequence of insufficient glycogen stores for athletes?

Insufficient glycogen stores can lead to fatigue in athletes because glycogen serves as a primary source of energy during prolonged or intense exercise. When glycogen levels are low, the body has to rely on alternative energy sources, such as fat, which are less efficient for high-intensity activities. This can result in early onset of fatigue, reduced performance, and an inability to sustain the required intensity for an extended period. Consequently, athletes may experience a significant decline in their exercise capacity, impacting their ability to train effectively and perform during competitions. Maintaining adequate glycogen stores through proper nutrition and carbohydrate intake is crucial for optimal physical performance and endurance.