1, half squat jump. At first, squat down to 1/4, put your hands in front, and jump up at least 20 to 25cm from the ground. If it is too easy, you can jump to 25-30cm. When you are in the air, you need to put your hands behind your back, then land and finish it once. Then repeat the action several times.

2. Lift your toes. First find a step or a book to pad your feet, and then put your toes on it. Your heels are not allowed to touch the ground or the mat. Lift your toes to the highest point, and then slowly lower them to finish once.

3. Jump over the steps. Find a chair, put one foot on it at a 90-degree angle, keep the thigh parallel to the ground, put the first half foot on the chair and jump as far as you can, change your feet in the air, then put them on the chair, repeat the previous actions, and put the original jumping foot back on the chair to complete another jump.

4. Jump vertically. Feet straight, shoulder width apart, knees "locked". Jump with your calves, bend your feet. Try not to bend your knees. When you get to the ground, jump quickly again and finish it once.