It is said of President Roosevelt that the only exercise he really enjoys is of that strenuous character which, to most men, would be hard work. Gladstone could give him no points in felling trees, and the cowboys of the plains, after numerous tests, were satisfied that he wore the title of “Rough Rider” by right. It was on one of his western hunting trips that he went two days with two ribs broken, not deigning to mention the circumstance lest it might offend cowboy etiquette to speak of such insignificant matters amid the excitement of the final round-up. Few men carry the burden of a weightier responsibility than the President, or have more exacting demands made upon their time. No one would have a better right to plead pressure of business as an excuse for taking no physical exercise. On the other hand, no one has greater need of a strong body and a clear brain. Appreciating this fact, his vigorous ride on horseback becomes almost as indispensable as his meals or his sleep, and it is rumored that this is often supplemented by a quiet bout with the gloves. Remembering that, as a child, his body was rather frail, his present rugged health bears strong testimony to the value of persistent vigorous exercise. =Walking.=--Rapid walking is one of the best methods of physical exercise. It not only develops the muscles of the legs and thighs, but increases the capacity of the chest. One of its chief advantages is that it is an out-door exercise. Running is still more stimulating, and gives increased activity to the muscles of the limbs and body, and to the organs of respiration. By combining walking and running with some simple form of in-door exercise, as dumb-bells, Indian-clubs, or pulley weights, a person will have nearly all the advantages of a fully-equipped gymnasium. =Over Exertion.=--Severe labor and violent exercise should be avoided. Many cases of broken-down health are due to excessive strain, the result of track races on wheel or foot, and similar indiscretions. =Age, Occupation, and Habit.=--Physical exercises must be chosen with reference to the age, occupation, and habit of the individual. The young, the middle-aged, and the old will each, as a rule, require some direction as to kind, and some modification as to length and intensity, of the exercise. =Childhood and Youth.=--Healthy children are never at rest except when asleep. This is the prompting of their nature. Their games and plays should therefore be directed, but not too much restrained. If, however, the natural increase in size and weight of a child’s body does not keep pace with its years, it would be well for the parent to inquire whether that result is due to excessive exercise, or to some other cause.