For people who lose weight. We should not only consider the seasonality of a year and the timeliness of a day, but also consider the actual needs. The best exercise time to lose weight is best arranged in the following three time periods. (1) Don't forget winter in the four seasons. Winter is the golden season to lose weight. Some obese people supplement blindly whether they need it or not in winter, resulting in overnutrition. If they don't exercise, they are bound to increase obesity. A morning is precious. The heat required for physical exercise in the morning is also provided by the oxidation of fat accumulated in the body. Obese people are caused by overweight and excessive accumulation of body fat, so we must seize the "prime time" in the morning to lose weight. (3) Before and after meals is a good opportunity. Exercise 30 ~ 45 minutes before meals can reduce weight, because: appetite decreases and food intake decreases. During physical exercise, the motor center and sympathetic nerve of cerebral cortex are in a state of high excitement, while the food center is in a state of relative inhibition, and the secretion of digestive glands is inhibited. B you can lose weight by exercising for 30 ~ 45 minutes after meals, because the digestion and absorption function is weakened. Exercise after meals causes sympathetic nerve excitement and adrenaline secretion. Due to the need of muscle to do work, the central nervous system redistributes blood, muscle arterioles expand, capillaries open in large numbers, and the blood flow of motor organs increases; On the contrary, the blood flow of digestive organs such as gastrointestinal tract decreases.