Fig. 7. Hindlimb segment/joint angles (mean values ±1 s.e.m.) at particular events (ROM = range of motion) in one stride compared across our speed range; A–G=speed categories (see supplementary material Tables S1 and S2); dimensionless speed (û) ranges are: A, very slow, <0.25 m s^–1; B, slow, 0.25–0.30 m s^–1; C, normal, 0.30-0.35 m s^–1; D, medium fast, 0.35–0.50 m s^–1; E, fast, 0.50–0.75 m s^–1; F, very fast, 0.75–1.0 m s^–1; G, Fr>1 run, û>1.0.