1) Kicking exercise: On the supine bed, put your hands around the back of your head, slightly raise your abdomen, and straighten your legs alternately up and down. The range is from small to large, from slow to fast, from less to more, and it is done about 50 times.

2) Pedaling exercise: put your hands on your sides, support the bed with your hands, bend your knees, pedal the bed with your hands on your sides, tilt your legs as far as possible, and then pedal alternately with your feet like pedaling a bicycle.

3) Right-angle movement: On the bed, hold the bed rail with both hands and tilt your legs upward. Don't bend your knees, keep your toes straight and make an angle of 90 degrees. After leaning, stop for a while and then fall down, and repeat until the abdomen is sour.

4) Press down: Stand by and watch the bed, support the bed with both hands, and retreat with both feet to make the body in a straight line. Bend your forearm and press down on your body. After stopping for 2-3 seconds, straighten your forearm and lift your body. Repeat this operation for 5- 15 times.