The fourth-grade pupils weigh 45 kilograms, which is a little fatter than normal. It should be noted that they can't gain any more weight, generally not more than 40 kilograms. It is suggested to control diet and exercise to lose weight, such as yoga, sit-ups, thin abdomen, treadmill, cycling to exercise thin legs, push-ups to exercise thin upper limbs, and hula hoop to practice thin waist. You shouldn't take oral medicine as the main way to lose weight. You have to be patient and persistent, and persistence is success. Height may be the standard value of height and weight for children with a height and weight of one meter. At present, the main factor affecting the baby's height and weight is an important indicator of development, such as nutritional imbalance. Therefore, it is necessary to have a regular physical examination to observe the baby's height and weight ratio, her diet, his exercise and sleep, which are all related to his development.