1. Sit-ups: Lie on the ground, cross your hands on your chest or behind your head, lift your upper body with abdominal muscle strength, and then slowly put it down. Repeat this action.

2. Side leg lift: Lie on your side on the ground, straighten your upper arm and bend your calf, then slowly lift your thigh and then slowly put it down. Repeat this action.

3. Flat support: kneel on the ground, support the ground with both hands, keep your body straight, push your body up with abdominal muscle strength, and then slowly descend. Repeat this action.

4. handstand: stand against the wall or chair, put your hands on the wall or chair to support your body, then push your body up with the strength of your abdominal muscles, and then slowly descend. Repeat this action.

5. Running: Running indoors or outdoors can exercise abdominal muscles and whole body muscles.

6. Yoga: By practicing various yoga postures, you can exercise your abdominal muscles and whole body muscles. Such as boats, plows, etc.

7. Skipping rope: Skipping rope is a simple and effective aerobic exercise, which can help burn fat and exercise abdominal muscles.