(13) Stand erect, feet together. Jump to the stride-stand position, at the same time raising arms sideways to shoulders, jump back to original position and lower arms. Repeat from ten to twenty times.
(14) Lie flat on back, arms at side, legs straight. Raise both legs till they are at right angles with body. From this position sway legs to the right and left side alternately.
(15) Lie flat on back, arms extended over head. Swing arms and legs upward simultaneously, touching the toes with the hands in midair, balancing the body on the hip bones and lower part of spine. Return to original position and repeat.
This is a difficult and strenuous exercise, and should not be attempted at first:
(16) Lie flat on stomach, hands under shoulders, palms down-ward, fingers turned inward, about six inches apart. This will give free play to the muscles of the chest. Raise the upper half of the body on the hands and arms as high as possible, keeping the body straight. Return to position and repeat until slightly fatigued.
(17) Same position as before. Raise the entire body on hands and toes, keeping arms and legs straight. Return to relaxed position and repeat the exercise.
As a variation, sway forward and backward while in the raised position.
(18) Lie flat on stomach, arms extended in front. Fling the arms upward and raise the upper part of the body as high as possible, keeping the legs straight. Return to position and repeat, but avoid excessive strain.
(19) Same position as before, but hands on hips or clasped in back. Raise upper part of body without assistance from hands or arms.
(20) Rocking chair motion: