Again, it is impossible to emphasize too much the value of the habit of sparing oneself as far as possible. You may be pretty certain that when the event comes off you will need all the nervous and muscular force at your disposal, and it is well to remember that the amount you have is but limited, and that although you have to play as effectively as possible throughout, there are many strokes which can be done with comparatively little effort in one way, but which if done in another are exceedingly tiring. For instance, the correct timing of a ball at tennis, and the bringing forward the weight of the body, using the large muscle areas to back up the arm, will drive a force or a boast with greater velocity than could have been attained by the arm alone, while the contribution towards fatigue and exhaustion thus entailed is infinitely less than if the forearm and wrist were taxed to their utmost. It is the business of every trainer, and so of every one, for each man is his own trainer to a far greater degree than anyone else can be, to develop his individuality, and though certain broad rules can be laid down about the wrong way to do a thing, and in a less degree the right way, much should be left to natural aptness and facility. For instance, if a man can easily execute a stroke in a certain way with good results, it is impossible to say that such is not the right way for him to do it; for the orthodox “right way” may be very difficult to such a man, and it is mere waste of time for him to acquire it, if by another method he can accomplish the same thing easily. Here everyone can find out a great deal for himself, and since facility in movement is half the secret of success, he should, if he finds a real difficulty in executing some stroke in the prescribed way, carefully look about to see if he has not at his command some other method. It is idle, for instance, for a short, thick-set man to emulate a long loose swing at golf; he might as well practise high jump in order to be able to deliver a service at lawn-tennis from the height at which a taller man can, or practise the “split,” in order to increase his reach. On the other hand, he has assuredly some advantage in his shortness that the long-legged man has not; it is this he must grasp and develop.