Bananas can be eaten in moderation before exercise, because the exercise will consume too much energy in the body, bananas contain a large amount of sugar, can reduce the body’s consumption of energy. Bananas can also play a role in eliminating the symptoms of nervous system fatigue, reduce the fatigue in the process of exercise. However, you should pay attention to the right amount of bananas before exercise, and not eat too much to prevent the body from having difficulty digesting food due to excessive exercise, resulting in indigestion and causing abdominal pain and diarrhea. You can also eat bananas after exercise, bananas can replenish the ions lost during exercise and energy, because bananas are rich in potassium and magnesium plasma. And eating bananas after exercise can also improve cells, increase metabolic levels and promote the body’s recovery. It also helps the body to digest food and promote the peristalsis of the gastrointestinal tract.