1. Bend forward: stand or sit down, put your hands on your knees, and bend forward slowly, with the emphasis on abdominal stretching. Hold this position for 10- 15 seconds, and then slowly return to the standing or sitting position.

2. Side stretching: Stand or sit down, put one hand on the other shoulder, then tilt your head to one side and feel the stretching on one side of your abdomen. Hold this position for 10- 15 seconds, and then repeat on the other side.

3. Sit-ups: Sit on your back, put your hands by your ears, bend your knees, land your feet, and then slowly lift your upper body until your elbows touch your knees. Be careful not to exert force on your neck or back. When finished, slowly lower your upper body and repeat this action 3-4 times.

4. Push-ups: Lie on the ground, put your hands on your shoulders, and then slowly push your body up until your arms are straight. Be careful not to bend your hips too backward. After finishing, slowly put down your body and repeat this action 3-4 times.

5. Torsion of sitting posture: Sit on the ground with your feet on the ground, then slowly put your right knee on your left leg, and at the same time turn left to feel the stretching in the center of your abdomen. Hold this position for 10- 15 seconds, and then repeat on the other side.

These movements can help you stretch your abdominal muscles in all directions and improve your flexibility and health. Please pay attention to maintaining the correct posture and breathing style in each movement, and adjust the intensity and duration of the movement according to your physical condition.