Long-duration exercise can deplete muscle glycogen stores, which are essential for energy during physical activity. Glycogen, stored in the muscles and liver, serves as the primary energy source for sustained exercise. When engaging in prolonged activities, especially endurance sports, glycogen reserves can become significantly reduced. This depletion can lead to fatigue, decreased performance, and increased muscle soreness. It’s important for athletes to replenish glycogen levels through adequate carbohydrate intake post-exercise, ensuring optimal recovery and performance in future workouts. Understanding glycogen management is crucial for athletes focusing on endurance.