1. Lift one leg and put it on the chair as close as possible to the thigh.
2. Straighten your back muscles and put your hands together on your chest. 、
3. Exhale and twist the upper body to the side of the leg. The angle range of 90 degrees shall prevail. At this point, the two palms squeeze each other hard.
4. slowly restore to the original state, and then repeat the action in the opposite direction.