Before exercise, we should give priority to foods with high sugar and low fat, such as bread, rice, noodles and fruits. These foods are easy to digest and can provide sugar as an energy source during exercise. The exercise time is less than 60 minutes. You can choose foods with high glycemic index, such as bread and sports drinks. These foods are digested quickly and can provide sugar quickly.

Foods high in fiber are more likely to cause stomach upset because they take a long time to digest. Some high-fiber foods are also rich in sugar, such as whole wheat bread, high-fiber biscuits and some high-fiber drinks. If these foods make you feel uncomfortable during exercise, you should avoid them.

Avoid eating these foods before exercise.