Fig. 8. Simultaneous lateral and dorsal views of a Dipsosaurus dorsalis running at 350 cm s^–1 at the beginning (A) and end (C) of electrical activity and at the maximum (L_max; B) and minimum (L_min; D) length of the right caudofemoralis muscle. The images are from the same sequence as shown in Fig. 3C, and the time elapsed since the beginning of the swing phase (foot-up) of the right hind limb is given above each panel. The base of the tail moves away from the side of caudofemoralis activity.