I like to sit in a chair with my hands on the armrests and lean back. Note that there is no chair, just imagine sitting in a chair. After that, I slowly squatted down and felt my ass really sitting in the chair. When doing this action, the waist should be hard, the position of the feet should not move, and the thighs should bear the weight of the body.

Step 2 "Ride a bike"

Lie flat on the floor, put your hands behind your head, bend your left knee as close as possible to your chest, your right elbow close to your left knee, and lift your right shoulder sheet. Then repeat this action on the other side.

3. Staggered leg movement

Lie flat on the floor, cross your legs, put your head in your hands, then try to slowly lift your crossed legs so that they are at right angles to the ground, and then slowly raise your head. Stop breathing once when you reach the highest point, and then repeat this action.

4, fitness ball exercise

Let yourself lie on the fitness ball, let your lower back touch the fitness ball, cross your hands on your chest, or hold your head. Lift your upper body from your waist to keep your body away from the fitness ball and keep your balance. Then lie down and repeat this action, just like doing sit-ups on a fitness ball, which is very effective for thin waist and abdomen.