1. Knee flexion and extension: Take the supine position, put a small pillow on your head, straighten your legs, and put your palms up under your head. Lift, lower and bend your knees slightly in turn, and do 6~8 times for your left and right legs.

2. Leg lifting exercise: the posture is the same as above. Put your legs together and lift them at a 45-degree angle, 4-5 times each.

3. Cheating action: the posture is the same as above. Straighten your legs, inhale slowly, spread your legs to both sides as far as possible, then exhale, put your legs together, and repeat for 4~6 times. Bend your legs, press your knees as far as possible to both sides, then close together, straighten your legs and return to the original state of preparation. Do this 6~8 times.

4. Leg exercise: Take a supine position, put a small pillow on your head, straighten your legs and put your hands on your sides. Lift your right leg first and stay in the air for a few seconds before you put it down. Repeat the above actions for the left leg for 4~6 times alternately.

5. Swing leg action: the posture is the same as above. Straighten your legs and swing left and right after lifting them in turn; Lift your legs, imitate the action of riding a bicycle, and swing back and forth 6 times each.

6. Side leg movements: the posture is the same as above. Straighten your legs, and divide your legs horizontally to the maximum extent in turn from left to right, without lifting your legs, 4 ~ 6 times each.