Now this list of fourteen exercises which we have extracted from a much larger number will, we believe, be found sufficient to exercise in a healthy and reasonable manner a very large proportion of the muscles of the body. They may seem, especially to anyone who has been accustomed to long exercises with heavy dumb-bells, mere child’s play, but if they are given a trial, and especially if the utmost rapidity is used in making those movements where [Illustration: EXERCISE XIV. [_To face page 84._] rapidity is enjoined, they will, we think, be found not unsatisfactory. Those people who are accustomed to gauge their exercise by the fatigue which it produces may not, it is true, be pleased with them, but for our part we do not for a moment believe that fatigue is any criterion of satisfactory exercise. It is perfectly easy to fatigue oneself in a very few minutes by unsuitable exercises, just as it is easy for a man accustomed to walk rapidly to feel real sensations of fatigue if he has to walk very slowly for half an hour. Yet no one would say that he had therefore enjoyed more satisfactory exercise. For to use a muscle wrongly is in itself fatiguing, and for this reason exercises of the muscles of the arms should be far more rapid than exercises for the legs, and exercises for the legs in the same way more rapid than those for the chest and abdomen. It would be out of the question to try to make the breathing muscles exercise themselves with the rapidity that is easy to the muscles of the ankle, and in the same way it is useless to exercise the muscles of the wrist only as fast as it is reasonable to exercise the muscles of the abdomen. They are adapted for widely different purposes; use then each for its own. The advantage which we claim for such exercises is that they give exercise and do not produce fatigue. Furthermore, they take far less time than ordinary courses of dumb-bell exercise, they require no apparatus whatever, they produce briskness of movement, and will keep the muscles in better condition for games and athletics than do mere slow strength-producing movements. But we should not for a moment urge a man who played games regularly to use at any rate all these exercises on those days when he is playing, for it is certain that some muscles, if not all, will be quite sufficiently exercised by the game, and thus it is mere waste of time on his part, and unnecessary expenditure of energy to add to that which is already sufficient. On the other hand, most games--at any rate as they are played by most people--will not exercise all the muscles which even this list covers, and a man might with advantage exercise those by these means.