1 trick: lie flat, lift your legs, and abdomen: lie flat, palm down to protect the coccyx below the hip, and raise your feet together. During this process, the height of your feet should not exceed 45 degrees, and you should remain suspended. .

Step 2: Stretch the abdomen vigorously to strengthen the muscle group: hold your head up and chest out, and let your hand shaft cross your knees; bend your knees in a sit-up position, but your feet are off the ground, and let your right hand shaft gently touch your left knee, and then do it once. In this process, not only the upper body makes a rotation change, but also the knees touch 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 and do sit-ups in this position. After a few times, it's time to change 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 together vertically, lift your upper body with your abdomen, and touch your toes with your fingertips at the same time, then lie flat immediately and continue.