According to research, coffee has a significant impact on athletes' nervous system performance. The negative and positive effects of coffee are obviously dependent on the amount and duration of consumption. One hour before exercise, a cup of coffee increases plasma concentration and improves body function. Furthermore, the body prepares to use fat reserves as an energy source for physical activity. Besides, drinking coffee before exercise helps the muscles endure strenuous physical activity without becoming fatigued later on.

Furthermore, drinking coffee after exercise reduces exercise-induced muscle pain.