EXERCISE 5.
Put your right hand and arm down at your side, fingers extended. Keeping the elbow and upper arm close to the body, bend the arm briskly at the elbow, still keeping the hand open, and in a straight line with the forearm. Repeat this exercise twelve times with the palm of the hand turned toward the shoulder, and twelve times with the palm of the hand turned away from the shoulder.
Now raise the upper arm, so that the elbow bends slightly upward from the shoulder. Repeat the same bending action of the elbow twenty times. The position of the hand is immaterial in this exercise.
Go through these motions with the left arm.