Lie flat on the floor, hands straight to the top of your head, hands crossed and knees bent. Then forcibly lift the upper body and shoulder surface, try not to stretch your neck and keep your arms straight.

Method 2: supine board exercise.

Hold the handle of the supine board, straighten your body forward, and bring your body back with abdominal muscles, which can play a good role in slimming your waist and abdomen.

Method 3: Keep your legs straight and thin.

Lie flat on the floor, lift your legs up at right angles to the floor, put your hands on your head or straighten your arms up, and force your legs up. Then lower your legs and arms. Repeat.

Method 4: Lie on your back, lift your legs and abdomen.

This action takes advantage of the strength of abdominal muscles. Lie on your back, put your arms on your sides naturally, cross your legs, lift your legs with the strength of your abdominal muscles, bend your knees, then put down your legs and repeat this action. This action is relatively simple and easy to learn, but you must use abdominal strength, not leg strength.