5 Abdominal internal and external oblique muscles are trained to lie flat, with feet bent 90 degrees (feet can be stepped on the wall or placed on a chair), hands crossed on the chest, upper body rolled up, and the contralateral upper back is off the ground with the force of abdominal rotation, and the lower back is attached to the ground, and the action is repeated 15 to 20 times.

6 Sit the waist rotating machine on the equipment, stick the chest on the cushion, clamp the cushion with thighs, rotate the body to one side, and then exchange the rotation to the other side, and repeat the action 15 to 20 times, paying special attention to sticking the upper body on the cushion.

7 The abdominal training machine lies flat on the equipment, holds the handles on both sides of the head with both hands, bends the knees with the feet, adjusts the weight to the appropriate load, and rolls the body, and continues to move back and forth 15 to 20 times. It should be noted that the body cannot relax completely when lying on your back.