Measures 1: Lie flat, lift legs and reduce abdomen. Lie flat and reduce your abdomen. Put your palms under your hips to protect your coccyx. Feet together, straight. In this process, the height of your feet will not exceed 45 degrees, and you will remain suspended. The second measure: the abdomen is stretched hard to strengthen the muscle group.

Stretch the abdomen vigorously and strengthen the muscle groups: keep your head up and chest out, and let the hand shaft cross your knees: leave your feet off the ground, bend your knees in sit-ups, and let your right hand shaft gently touch your left knee, and then do it again as a unit. In this process, not only does the upper body make a rotation change, but the knees also contact the hand shaft in turn.

The third measure: oblique twisting and abdomen.

Oblique abdomen: Do sit-ups, and put your feet obliquely. You need to turn your folded feet to the left or right to do sit-ups in this position, and then complete them several times on different sides.

The fourth measure: swing left and right, bend your knees and abdomen.

Swing left and right, bend your knees and abdomen: straighten your legs and touch your toes with your fingertips: lift your feet vertically, lift your upper body with your abdomen and touch your toes with your fingertips, then lie flat immediately and continue.