Boys can also grow 5-10 cm taller after voice change, but this figure may be affected by genetics, nutrition, exercise and other factors, so there are individual differences. Boys usually start to change their voices at the age of 14 or 15, and there may also be variations in the start and duration due to differences in physical fitness and other factors. Most boys are still in puberty when they finish changing their voices, and puberty is the peak of growth and development. Height usually stops changing after the epiphysis closes, therefore, before then, children can be given adequate and nutritionally balanced meals, rich food choices, such as meat, eggs, milk, vegetables, fruits, mixed grains, beans, etc., and appropriately increase the intake of protein, calcium, phosphorus, etc.; often participate in physical exercise, you can choose to do pull-ups, jump rope, swimming, playing basketball and other sports to promote the growth of bones; ensure Sufficient sleep, at least 8 hours of sleep every day, get up early and go to bed early; keep a happy mood, you can do some recreational activities after school to relieve the tension brought by learning, etc. All of these measures can help children grow taller to a certain extent. However, it is also important to note that the pursuit of height should not be excessive, because height is also influenced by genetic factors, as long as the child’s healthy development can be ensured. Some parents may give their children excessive calcium supplements during this period in order to pursue height, which may cause other bone diseases.