The balance between the energy consumed by eating and the energy consumed by exercising is the key to health. The body’s calorie consumption is mainly used for basal metabolism, the thermal effect of food and physical activity. Basal metabolism varies greatly among individuals and has a lot to do with genes, body type and living environment; the heat effect of food depends on the type and quantity of food eaten; the calorie consumption of physical activity has a great relationship with the time and intensity of exercise, and the adjustable space is larger than the other two, and it is easy to operate. Therefore, exercise is an important means of regulating energy balance. Eating more and exercising more is an important excuse for many eaters to taste good food. After a full meal, in order to remedy the weight gain that may result from their over-eating, many people choose to increase their exercise, which can burn some more calories. Within certain limits, this method is useful. Then, on the other hand, if you eat less is it possible to exercise less? This may be a common idea among many people who do not like to exercise and want to lose weight. Eating less can be less exercise is the wrong idea. First of all, too little food intake will lead to insufficient supply of nutrients required by the body, increasing the risk of malnutrition; secondly, long-term food intake will change the metabolic habits of the body, anorexia and other difficult to correct eating habits; again, exercise and diet are not directly equal to the two means of regulating energy balance, exercise is more important to strengthen the body, enhance resistance and improve the body’s ability to adapt to the external environment. The more important point of exercise is to strengthen the body, strengthen resistance, and improve the body’s ability to adapt to the external environment, not just consume calories to control weight so simple. Therefore, even if you do not gain weight by eating less and exercising less, it is not a healthy lifestyle. An organism lacking exercise has poor resistance to disease, loses muscle tissue easily, and is prone to overweight and malnutrition. It is equally important to “keep your mouth shut and your legs open” and to eat and move in a balanced manner to get closer to health.