Glycogen can be replenished by, for example, eating foods rich in carbohydrates or high in sugar. Glycogen can play a role in storing energy, regulating blood sugar concentration, etc. It is especially suitable for some people who need to perform endurance exercise. Supplementing sugar before exercise can increase energy reserves and help improve the energy for endurance exercise; glucose will be consumed in the process of exercise, so it is also necessary to replenish glycogen for recovery after exercise. Glycogen replenishment can be achieved by eating appropriate foods high in sugar, such as glucose, chocolate and honey water, as well as foods high in carbohydrates, such as rice, noodles and steamed bread. It should be noted that eating high sugar foods is not recommended for patients with high blood sugar; healthy people should also take moderate amount of glycogen supplementation. People who need to supplement glycogen should do so in a scientific and reasonable way.