1. Sit-ups: Lie on the ground, cross your hands on your chest, put your feet together, bend your knees, then lift your upper body up until your elbows touch your knees, and then slowly lower it. Repeat this action 10- 15 times.

2. Side leg lift: Lie on the ground, with the upper arm straight and the lower arm in front of your body. Then lift your thighs until they are perpendicular to the ground, and then slowly lower them. Repeat this action 10- 15 times, and then repeat on the other side.

3. Sit with your legs closed: Sit in a chair with your hands on both sides of the chair and your feet together on the ground. Then lift your legs so that they are perpendicular to the ground, and then slowly lower them. Repeat this action 10- 15 times.

4. High-five under your legs: Sit in a chair, put your hands on both sides of the chair, and put your feet together on the ground. Then lift one leg, pat the inside of the other leg with your palm, and then slowly put it down. Repeat this action 10- 15 times, and then repeat on the other side.

5. Kneeling posture: kneel on the ground and put your hands under your shoulders. Then extend your left arm forward, as close as possible to your right knee, and extend your right arm backward, as close as possible to your left knee. Repeat this action 10- 15 times, and then repeat on the other side.