Exercise is the healthiest way to lose weight, but it can't be immediate. Therefore, exercise must be persistent, and you can only burn it by walking on the sports ground for an hour or jogging for twelve laps (half an hour). This is the difficulty of losing weight through exercise. What's more, after exercise, the appetite is wide open, and the input of food calories will unexpectedly exceed the calories consumed during strenuous exercise. So many people gain weight after exercise. Exercise must also be combined with dieting in order to effectively burn excess fat in the body and achieve the purpose of losing weight; But dieting alone can effectively lose weight. In the first two weeks of dieting, the weight loss is the fastest, but the longer the dieting time, the less the weight loss. After dieting and losing weight for six months, the basal metabolic rate of human body (referring to the working efficiency of cells) will drop by 40%, and the fat in human body will burn more and more slowly, making it more and more difficult to lose weight. After human beings begin to age in middle age, it is also because the basal metabolic rate slows down, fat accumulates in the body and weight increases; After people who exercise regularly stop exercising, their basal metabolic rate slows down and their weight increases. Exercise can increase basal metabolic rate and make body fat burn quickly. After each exercise, the basal metabolic rate of the human body can be increased by 24 hours. Therefore, exercising once every two days (or three times a week) for more than half an hour each time can make the body burn more than 300 calories of heat energy, so that the basal metabolic rate of the human body will not slow down. At this time, the excess fat in the human body can be effectively burned. If you only exercise for fifteen minutes at a time, you will burn sugar, but not fat. After half an hour of exercise, you will start to burn more fat. The longer you exercise each time, the more fat you burn. This is because the main energy for continuous exercise is fat rather than sugar. On the contrary, the energy of instant explosive exercise is sugar rather than fat, so this kind of exercise is not good for losing weight.