It is recommended to exercise for one hour after meals. Generally, weight-loss exercises should be carried out three times a day, and it is more appropriate to do them once in the morning and evening. The best time to do aerobic exercise is afternoon. In the afternoon, the sun recedes and personal spiritual vitality begins to rise. Aerobics is the easiest way to lose weight. Before and after the weight-loss exercise, it is very important for safety to make full preparations and appropriate finishing activities. When the room temperature is above 20℃, the preparation time is 10 minute, and when the room temperature is below 20℃, the preparation time is appropriately extended. The end time of the activity is about 10 minute, which is not affected by the temperature change.