The study found that high-intensity exercise can be carried out two hours after meals; moderate exercise should be scheduled for one hour after meals; light exercise is most reasonable to be carried out half an hour after meals. Accordingly, several optimal exercise time periods can be introduced: morning hours: morning to before breakfast morning hours: 2 hours after breakfast to before lunch afternoon hours: 2 hours after lunch to before dinner evening hours: 2 hours after dinner to before bed The above periods have advantages and disadvantages of exercise, such as the morning hours: exercise intensity is not properly controlled, it is easy to cause hypoglycemia. Exercise in the morning and afternoon hours, but also by the work, work, household chores and other objective factors. Modern exercise physiology research shows that the highest and lowest point of human physical strength is controlled by the body’s “biological clock”, which generally reaches its peak in the evening. For example, the human metabolic rate in the afternoon 4: 00 to 5: 00 will reach its peak, the body’s flexibility, flexibility also reached the best state; heartbeat and blood pressure regulation in the afternoon 5: 00 to 6: 00 between the most balanced, while the body smell, touch, vision, etc. also in the afternoon 5: 00 to 7: 00 between the most sensitive. Therefore, a comprehensive view of the evening exercise effect is better. In addition, the human body between 4:00 p.m. and 7:00 p.m. hormone activity in the body is also in good condition, the body’s ability to adapt and the sensitivity of the nerves is also the best. Therefore, advocate evening exercise, but in the evening hours, pay attention to the intensity of exercise, otherwise the intensity is too high will make sympathetic excitement, preventing sleep.