This exercise puts in action the extensors and flexors of the thighs and legs, a great number of the muscles of the trunk, and more or less those of the shoulder, according to the rapidity of the pace, and the greater or less degree of projection communicated to the arm, which, in this exercise, acts as a balancer of the body, the motion being exactly the reverse of that of the corresponding leg. It draws the fluids more into the inferior than superior members: it gives but little strength to the latter. Walking may be performed in three different times,--slow, moderate, or quick--which somewhat modify its action. THE SLOW WALK, OR MARCH. In the march, the weight of the body is advanced from the heel to the instep, and the toes are turned out. This being done, one foot, the left for instance, is advanced, with the knee straight, and the toe inclined to the ground, which, without being drawn back, it touches before the heel, in such a manner, however, that the sole, at the conclusion of the step, is nearly parallel with the ground, which it next touches with its outer edge; the right foot is then immediately raised from the inner edge of the toe, and similarly advanced, inclined, and brought to the ground; and so on in succession. (Plate VIII. figs. 1 and 2.) Thus, in the march, the toe externally first touches, and internally last leaves the ground; and so marked is this tendency, that, in the stage step, which is meant to be especially dignified,--as the posterior foot acquires an awkward flexure when the weight has been thrown on the anterior,--in order to correct this, the former is for an instant extended, its toe even turned backwards and outwards, and its tip internally alone rested on the ground, previous to its being in its turn advanced. Thus the toe’s first touching and last leaving the ground, is peculiarly marked in this grandest form of the march. This pace should be practised until it can be firmly and gracefully performed. THE MODERATE AND THE QUICK PACE. These will be best understood by a reference to the pace which we have just described; the principal difference between them being as to the advance of the weight of the body, the turning out of the toes, and the part of the foot which first touches and last leaves the ground. We shall find that the times of these two paces require a further advance of the weight, and suffer successively less and less of turning out the toes, and of this extended touching with the toe, and covering the ground with the foot. [Illustration: _Plate VIII_ _Page 32._ Walking.] THE MODERATE PACE.