The main component of coffee is caffeine, which is often said to refresh the mind, but coffee also has a great diuretic effect, which can promote the rapid discharge of water in the body.

After exercise, the body loses a lot of water and inorganic salts. At this time, drinking coffee to promote urination will obviously worsen the water shortage of the body, which is an undesirable choice.

Because of the exciting effect of caffeine, you can drink coffee an hour before exercise to improve your mental state.