Height is largely determined by genetics, before the skeletal closure of 21-year-old men want to grow taller must pay attention to do more exercise, such as basketball, badminton, etc., and also pay attention to the night to maintain sufficient sleep, human growth and development usually occurs at night, only sufficient rest to be able to better grow taller, in the daily diet should also pay attention to eat more protein, calcium content of food, such as eggs, milk, shrimp, Milk, shrimp. In the process of growth and development, if there are leg cramps and pain, it is likely due to the lack of sufficient calcium, it is recommended to supplement calcium tablets to help the body’s development, but also pay attention to more sunshine, can promote the body’s absorption of calcium, to eat more vitamin D-rich food to help the body grow, but also adhere to stretching activities every day, diet should also ensure nutrition.