Sitting as erect as possible with actively expanded chest, pivot
the shoulders and upper part of the torso as far as possible, first
to the right and then to the left.
This exercise may be performed to advantage with quadruple rhythm.
This movement exercises almost the opposite muscles from Exercise No.
10. It also has the same beneficial results in the extension of the
chest, the removal of constrictions or interferences with the diaphragm,
and has a beneficial effect also upon the stomach and all the vital
organs.
It is an important exercise for strengthening the muscles of breathing
and deepening respiration. It should be repeated many times.