EXERCISE 15.
Hold your left arm across the chest palm up, but with the wrist bent as far down as possible, the fingers easily curled. Place the right arm in a similar position, but with the palm down, having the wrist of the right hand bent upward and fingers similarly curled. Lay the finger tips of the right hand on those of the left. From this position twist the forearms in opposite directions until the finger tips again come together, this time the palm of the right hand bent up, and of the left bent down.
Reverse the motion and repeat the exercise twelve times.