To become a lean body to do the following: 1, more exercise, adhere to the exercise body, improve the basal metabolic rate, gradually increase the intensity of exercise, anaerobic exercise and aerobic exercise combined to increase muscle content, promote fat metabolism, increase calorie consumption. 2, diet adjustment, control the total daily calorie intake, to light, easy to digest diet, eat more vitamin-rich fresh vegetables and fruits. Small and frequent meals, three meals should be reasonable, pay attention to balanced nutrition, and supplement high-quality protein such as milk, beef, lean meat, eggs, etc. The diet is based on the intake of calories, do not overeat, do not eat greasy and high-fat, high-calorie food, do not drink alcohol. 3, life conditioning, adjust the mentality, maintain a positive and optimistic mood, regular life, do not stay up late, to ensure adequate sleep, to keep the bowels smooth.