1, usually do more pull-ups, such as playing basketball, high jump, parallel bars, girls can jump rope and play badminton;

2. Have a reasonable diet and eat more foods and foods containing calcium, iron and zinc, such as milk, bone soup, beans, shrimp, crab, beef, etc.

3, pay attention to reasonable arrangements for work and rest, don't stay up late, get enough sleep at night,

4. (Le Yuan recalled) The article said that the height is six centimeters, and salt is also the enemy, so we must develop the habit of eating less salt.

5. Eat less snacks: candy, chocolate, peanuts and other snacks.