What is the 30-minute body-building exercise with thin abdomen?

1, lie flat on the bed, legs together, hands flat on the side. Raise your head and kick alternately. Kick the left and right legs once each as a group, a total of 60 groups.

2. Lie flat on the bed, lift your legs together and perpendicular to the bed surface, and touch your feet with your hands straight. Every time the upper body is lifted, it is a group, with a total of 30 groups.

3, sitting on the bed, legs together straight, upper body doing, hands supporting the bed. Step back and then step back, legs together and contract. Each leg extension and leg retraction is a group, and * * * counts as 30 times.

4, sitting posture, legs bent at 90 degrees, hands flat on the chest, do a twist. Turn left and right once for a group, counting 60 groups.

5. Lie on your side, with your legs together and bent 90 degrees, with your thighs and upper body in a straight line, one forearm supporting the ground and the other inserted into your hip joint. Hip up and down, * * * 30 groups.