Sugar is emphasized as the main food for athletes because it can be counted as the cleanest energy source for the human body and can help athletes to play their best sporting ability. When the human body is exercising, our muscles are constantly undergoing coordinated and powerful contractions, and our body needs to consume a large amount of sugar as a cost to ensure that the exercise is carried out properly. Studies have shown that taking sugar-rich foods or sports drinks after exercise can significantly shorten the body’s recovery period, and the more timely the sugar supplementation after exercise, the faster the physical recovery process. Generally speaking, when an exerciser starts to exercise, he or she should replenish the body fluids that will be lost. The low exercise capacity of the human body and the weakening of physical strength are in fact, from the point of view of exercise biochemistry, a large consumption of glycogen and insufficient replenishment. If replenished in time, glycogen can be quickly restored and play a very important role in the maintenance of exercise capacity. Under normal environmental conditions, if less than 2 hours of exercise, supplementation with a large number of sugar-sweetened beverages may make it counterproductive for exercisers with weight restrictions, so it must be analyzed in conjunction with specific circumstances, but for special circumstances such as high-temperature environments or several days of continuous intense physical activity, sugar will replenish the glycogen reserves of the exerciser, making the exercise more durable and the recovery process faster.