The weight loss effect of night running is better. 1, according to epidemiological surveys, the best time period for running to lose weight is 19:30-20:30 in the evening, when the fat loss effect of running is the best. Because the basal metabolic rate of the human body is low at this time, after running will significantly improve the basal metabolic rate in the body, improve the basal metabolic rate on weight loss will play a better role effect. 2, according to the clinical display of emergency medicine, around 19:30-21:00 in the evening is the human coronary artery insufficiency heart disease, the incidence of acute myocardial infarction is relatively low moment, at this time after exercise will not necessarily give the body Cardiovascular overload. Therefore, it is recommended to run at this time to better help the body. 3, the air at this time is relatively less carbon monoxide, so running in this time is also better for the body’s respiratory system.