Fig. 3. Angles of the tail and hindlimb, and strain and electromyograms from the caudofemoralis muscle, for one stride cycle for one individual of Dipsosaurus dorsalis at each of three speeds 50 cm s^–1 (A), 200 cm s^–1 (B) and 350 cm s^–1 (C). The muscle strain is expressed as a percentage change from resting length (L₀). The elapsed time within each stride shown at the bottom of each panel starts and ends at the beginning (foot-up) of the swing phase (white bar), and the black bar indicates the duration of the stance phase after footfall. The numerals to the left of each electromyogram indicate the longitudinal positions of three different electromyograms electrodes within a single muscle (see Fig. 1), and M and L indicate the medial and lateral locations within a longitudinal position, respectively.