This not only supplements water, but also supplements salt, glucose and vitamins, so that the metabolism of water and salt in the body is balanced. Replenish water during exercise: For general fitness athletes, if the exercise time does not exceed 60 minutes, pure water can be supplemented; If it is longer than 60 minutes, it is necessary to supplement sports drinks containing electrolytes and sugar. Hydrate after exercise: Drink with sugar and electrolyte should be supplemented. The sugar content in the beverage can be 6%-8%, and the sodium salt content can be 30-40mmol/L, so as to promote the rapid recovery of plasma volume and the rapid rehydration of tissues and cells.