Glycogen

The body stores carbohydrate as glycogen, including in the muscles. Eating carbohydrate after exercise helps replenish these stores so that energy is available for the next session. A carbohydrate-rich meal, such as pasta, or a suitable snack can contribute to this replacement.

Carbohydrate stored as glycogen can supply glucose for rapid energy release. Anaerobic breakdown of glucose produces lactic acid. During sustained intense work, its build-up is associated with fatigue, so the performer cannot maintain that intensity for long and may have to slow down or stop.