Evening exercise is better than the morning exercise, the specific benefits of the following four points. First, the evening air to be better than the morning, because the night plants did not occur photosynthesis, so there is not yet a large amount of carbon dioxide, when the oxygen content is higher, so the oxygen content in the air is significantly higher than in the morning, this time is suitable for aerobic exercise, the body will absorb more oxygen, and the heart, lungs to improve the function of the effect is better than in the morning. Second, the body’s blood concentration at night is thinner than in the morning, so the burden on the circulatory system when jogging and fitness is relatively low in the morning. Third, aerobic exercise at night can more effectively improve the level of metabolism in the body, because the human body has a low metabolic rate at night, so after running can effectively improve the basal metabolic rate. Fourth, the night after exercise helps sleep, and has a better effect on improving sleep treatment.