The best time to exercise every day is 19:30-20:30 in the evening. According to evidence-based medicine, according to the analysis of the sudden death rate of emergency medicine, this time because the incidence of acute myocardial infarction and acute cerebral infarction patients at least, so this time exercise will not cause too much load on the cardiovascular and cerebrovascular. Evening 19:30-20:30 is a relatively good air quality throughout the day, this time after exercise will allow the body to absorb more oxygen. At this time the body also belongs to the endocrine and metabolic rate is relatively low, this time exercise will accelerate the body’s endocrine and basal metabolic rate, on weight loss and fat loss will play a certain effect. In addition, this time is 2-3 hours before going to bed, this time to exercise, but also to accelerate the quality of sleep effect.