This wholesome but less inspiring endeavor, which combats one of the greatest evils that under modern civilization threatens man's physical weal, is in some respects as easy and practical as it is useful. The great majority of city bred men, as well as all students, are prone to deleterious effects from too much sitting; and indeed there is anatomical evidence in the structure of the tissues, and especially the blood-vessels of the groins, that, at his best, man is not yet entirely adjusted to the upright position. So a method that straightens knees, hips, spine, and shoulders, or combats the school-desk attitude, is a most salutary contribution to a great and growing need. In the very act of stretching, and perhaps yawning, for which much is to be said, nature itself suggests such correctives and preventives. To save men from being victims of their occupations is often to add a better and larger half to their motor development. The danger of the system, which now best represents this ideal, is inflexibility and overscholastic treatment. It needs a great range of individual variations if it would do more than increase circulation, respiration, and health, or the normal functions of internal organs and fundamental physiological activities. To clothe the frame with honest muscles that are faithful servants of the will adds not only strength, more active habits and efficiency, but health; and in its material installation this system is financially economic. Personal faults and shortcomings are constantly pointed out where this work is best represented, and it has a distinct advantage in inciting an acquaintance with physiology and inviting the larger fields of medical knowledge.
D. The fourth gymnastic aim is symmetry and correct proportions. Anthropometry and average girths and dimensions, strength, etc., of the parts of the body are first charted in percentile grades; and each individual is referred to the apparatus and exercises best fitted to correct weaknesses and subnormalities. The norms here followed are not the canons of Greek art, but those established by the measurement of the largest numbers properly grouped by age, weight, height, etc. Young men are found to differ very widely. Some can lift 1,000 pounds, and some not 100; some can lift their weight between twenty and forty times, and some not once; some are most deficient in legs, others in shoulders, arms, backs, chests. By photography, tape, and scales, each is interested in his own bodily condition and incited to overcome his greatest defects; and those best endowed by nature to attain ideal dimensions and make new records are encouraged along these lines. Thus this ideal is also largely though not exclusively remedial.