2, how to do yoga thin abdomen: first lie flat, then bend the thigh, the bending angle is 90 degrees, so that the calf is parallel to the ground, then put your hands on your sides naturally, palm down, the upper body is slowly tightened, and your back should be close to the floor; Then start from the hip, toe down, return your feet to the original position in two steps when exhaling, and then repeat the above actions with the other leg, so it is enough to alternate 12 times.