13 years old is still in the growth stage. If you deliberately lose weight, it will affect your child's normal growth; But if the child is really fat, it is not good for the health. So now we all advocate healthy weight loss. Morning exercise is good for your health. You can get up and run for more than half an hour every morning. After running, you can do exercise and exercise your wrists and ankles. Try to do aerobic exercise. No less than three meals a day. Eat regularly and drink a small amount of boiled water before meals. When you lie in bed at night, you can do dozens of sit-ups, which is beneficial to lose fat on your stomach.