Lie on your back and lift your legs. Lie flat on the bed or mat, with your back close to the bed surface (or ground), hold the head of the bed with both hands to fix the upper body, and lift and put down your legs at the same time, repeatedly. Pay attention to 1 when doing actions. The body is easy to shake, so you can find a partner to resist the upper body to prevent the body from shaking. 2. If you want to exercise the lower abdomen to the maximum extent, you should try to lift your hips at the highest point of each movement to fully mobilize the muscles of the lower abdomen. 3。 If you find this action difficult, you can bend your legs slightly to reduce the difficulty and complete the action.

Lie on your back, lift your legs, and pedal your bike. Lie flat on the bed or mat, with your back close to the bed surface (or ground) and your legs held high, so that your legs stay in the air and repeatedly pedal your bike in the air.

Pay attention to 1 when doing actions. You will feel very tired when you do this action for the first time. The amplitude should not be too large and the speed should not be too fast. 2. After you have mastered the movements, you can increase the exercise intensity by straightening your legs every time you "pedal".

Sit-ups on the bench lie flat on the ground, with legs resting on the bench (or chair, bed edge, steps), and upper body sit-ups with abdominal muscle strength. When recovering, the shoulders slowly fell back to the ground, and the abdominal muscles were always tight.

Pay attention when doing this action.

1. Don't put your hands behind your head. Because when you are exhausted, you will put your head in your hands, which will damage your neck muscles.

2. The higher the shoulder is from the ground, the straighter the better, but the waist should stick to the ground.

3。 Pay attention to keeping the upper body stable,

4. Don't kick your feet.