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 31. One need not degenerate physically because his occupation is sedentary. Sit as little as possible. Standing and lying are more natural and healthful positions than sitting. One may exercise while sitting at work by deep breathing and by stiffening the muscles of first one limb a few seconds, then the other. All the muscles in the body may be exercised in this way.

32. The only directions needed are:  ten or twenty times every hour, or oftener. The best "breath" gymnastics are swimming, hill- or stair-climbing, and rapid walking or running. Always breathe through the nose.

33. In walking, and carry it well to the front. Swing the arms moderately, and for the average adult. Most housekeepers and laborers do more.

34. by some simple exercises, such as walking on tiptoe with