You can choose the following methods, and persistence will have an effect.

Specific methods:

1, lie on your back, keep your upper body still, cross your feet, and exert pressure on your abdomen.

2. Raise your feet at right angles to your upper body, then put them down and do it repeatedly.

3. Embrace your knees with your hands, keep your thighs close to your abdomen, then take them back and do them repeatedly.

4. Lift your feet up, just like pedaling a bicycle, and turn your left and right feet back and forth. Do it twice a day for about 10 minutes each time.