Now, it can readily be seen that the greater the chest capacity the greater the reserve force. As it is in the muscle of the “physical culture” man so it is in the chest development of the same class――an unnatural condition. These latter possess, by constant deep breathing, forcibly inhaling and exhaling, a large chest. But there is no reserve force; all the cells are constantly filled. The chest development is good to look upon, but we must remember that the owner of such a chest has no reserve power――no extra breathing space to call upon when most needed. He has reached his limit at the start――a condition fatal to athletic work. A condition injurious to the man’s future health, for there are many times in illness and in emergencies when he will need some reserve force to fall back upon. It is like taking a journey and spending all your money at the start――when you need some, it is not there. Athletes are healthy, not because they are athletes, but because all healthy individuals are athletes; not necessarily competitors in games or strivers after honors, but persons who enjoy outdoor living and breathing the fresh red-blood giving air. But there are so many mistakes made by youths and boys who strive to become athletes before their body machinery is properly adjusted, that much harm has been done by overtraining and a misunderstanding of what really constitutes a healthy man. Americans have absorbed much of the energy in the world, but not all its wisdom. Too many of our athletic instructors at the schools have tried to turn out athletes instead of strong men and women. When we read in the daily papers of the collapse of a celebrated athlete, or the breaking down during training of a young aspirant for honors on the cinder path, we naturally surmise that fundamental knowledge of the physiology of the muscular mechanism of the human body is either submerged by the overpowering desire to make a record or is totally absent among certain trainers and their pupils. The want of wisdom concerning man and his body is the cause of many sad conditions existing to-day among formerly strong and healthy young men. A comprehensive idea of the physiology of growth, of the physiologic and chemic relations of strength and endurance to age and condition, would be of great value to a large number of old individuals――not old in years, but old in vessels and tissues――who strive to put an unusual strain on their weak arteries, as well as to the youth whose central nervous system is often permanently injured by over-exertion in attempting to make records placed by carefully trained and intelligent athletes.