Reduced exercise and a sedentary lifestyle are among the most important factors leading to the development of obesity. In ancient China, there is also a conclusion on this issue. For example, in Suwen, it is mentioned that “people in the ancient times …… ate in moderation, lived in moderation, and did not delude themselves with work. Therefore, the form and spirit, and the end of its natural life, degree of 100 years is gone”; Qing Dynasty Chinese medicine book “Introduction to Medicine” said: “all day long is sitting at the end of life and death”. Increased movement and exercise can reduce adipose tissue, improve sugar and lipid metabolism, maintain energy balance, effectively prevent obesity and reduce cardiovascular damage. The development of exercise habits is conducive to the development of a healthy lifestyle in children, not only to prevent obesity in childhood and adolescence, and its benefits can continue into adulthood. The principles of exercise design are appropriate exercise mode, appropriate exercise intensity, appropriate exercise time and appropriate exercise goals. Exercise mode, should be more use some both increase energy consumption and easy to adhere to the aerobic exercise program. For example, brisk walking, jogging, jumping rope, playing ball, swimming, cycling, hiking, etc., can consume more fat and achieve the effect of weight control. Also need to take into account the weather, living environment, site and other specific circumstances when choosing sports, various forms of sports interspersed with each other to avoid boring and monotonous forms, to mobilize children’s interest and enthusiasm. At the same time, children and adolescents should be asked to do some chores that they can do, such as sweeping, mopping, laundry, tidying up the room and taking out the garbage. The energy consumption of various sports is different. Common sports such as basketball consume 0.14 Kcal/min per kg of body weight, swimming 0.16~0.18 Kcal/min per kg of body weight, running 1.6km depending on the time consumed are 0.19 Kcal/min (9min finished), 0.22 Kcal/min (8min finished), 0.24 Kcal/min (8min finished), 0.24 Kcal/min (8min finished), 0.22 Kcal/min (8min finished). 0.24 Kcal/min (7min finished), 0.28 Kcal/min (6min finished), and 0.08 Kcal/min (16min finished) and 0.07 Kcal/min (20min finished) respectively for the energy consumed for the completion of 1.6km of slow walking. Individuals should choose the appropriate type of exercise according to their specific physical health status and quality. Exercise intensity can be measured by pulse rate. Aerobic exercise pulse should reach 60% to 75% of the maximum heart rate, can refer to the formula: appropriate pulse = (220 – age) × (60% to 75%). Exercise intensity needs to be gradual, the heart rate can be controlled at the low limit at the beginning of exercise, with the improvement of adaptive capacity, gradually increase the intensity of exercise, so that the heart rate reaches the high limit. Each exercise must last at least 20-30min, 20min is the shortest exercise time to achieve health effects, more than 30min is the more ideal exercise time for calorie and fat consumption, in addition, there should be 10-15min of preparatory activities before exercise, there should be 5-l0min of recovery activities after exercise. Therefore, the American College of Sports Medicine recommends that the daily exercise time is 60min. Exercise time and exercise volume should be gradual and gradually increase. Atlantis et al. confirmed that only aerobic exercise of 155-180 min or more per week is effective in reducing body fat in obese children, but the effect on reducing body mass and improving central obesity is uncertain. Children and parents should have clear goals for exercise therapy, which should result in weight and body fat loss, improved cardiorespiratory fitness and physical fitness after treatment, and obesity levels should not rebound to their original levels in the short term after cessation of treatment.