Pupils can exercise abdominal muscles by doing sit-ups, doing 3-5 groups every day, and each group does 10- 15. The rest between groups is about 1 minute. Do less at first, step by step, and gradually increase according to your endurance. Before doing sit-ups, they should do enough warm-up exercises, and then they should do enough relaxation and stretching exercises.

Ways to practice abdominal muscles:

1, cocoon-shaped belly roll: put your hands on the ground, open your head and legs to both ends respectively, take a deep breath during the process, roll forward in an arc while withdrawing your legs, and exhale slowly while feeling the contraction of your abdominal muscles, and keep this posture for one second before recovering.

2. Russian Swivel: The calf is parallel to the ground, or you can put your leg directly on the ground, take a deep breath, turn your body to one side with the spine as the center, and exhale at the same time, make the thigh slightly thinner, so that the external abdominal oblique muscle can contract more fully.

3, flat support upward: elbow landing to make a flat support posture, do an action similar to a round shoulder, while maintaining this posture, slowly lift your hips, while exhaling, and keep it at the top for one second and then recover.