If a girl is thirteen years old, there may be a growth period afterwards. Of course, this is only possible. This height and weight are relatively symmetrical. It is recommended not to lose weight during the growing period, but try to keep it. After the growth period is over, you can start to lose weight, so as not to affect your physical development. All the body fat is eaten, so if you want to lose weight, you must start from this point, eat less fried, grilled and smoked food and drink less. For example, bananas, apples, radishes and spinach are rich in nutrients and have the effect of losing weight. Try to give priority to beef and don't eat too much meat. In exercise, it is not beautiful to reach a certain strength without too much muscle. Remember to massage after running and squatting. Try not to exercise too hard, step by step, and then massage the part. If you have the conditions, you can go to the gym to exercise and have the guidance of a professional coach to avoid misunderstanding.