Experience steps: 1 Lie on the bed and press the bed with both hands. You can lift your knees with one leg or both legs straight, do it faster, and lower your legs slowly, doing it for about 30 times.
2 Lie on your back, put your hands around your thighs, slowly pull your knees to your chest, keep this posture 10 second, raise your head and let your forehead touch your knees as much as possible 10 second, three times a day.
Lie on your back, straighten your legs, lift your left foot, put your hands around your thighs and hold them tightly, and gently pull your knees to your chest, 10 second, three times a day.