Caffeine is a natural stimulant, which is contained in most sports drinks. Many bodybuilders drink a cup or two of coffee before training, and some sports organizations have also confirmed that coffee can improve people's sports ability.

Coffee can make muscle tissue begin to use fat instead of carbohydrates as energy source. Coffee is used by many endurance athletes because it can improve the energy level of the human body.

Coffee can make up for the congenital deficiency of many people's sports genes. This is also the reason why the International Olympic Committee banned caffeine, and even stipulated that snickers were not allowed before the game.