Fig. 6.
Comparison of 3S (stride signal symmetry) values and Hildebrand gait diagrams. A: example representative gait diagrams plotted using relative timings from Refs. 18 and 19. The phase difference between the fore feet is denoted as F, the phase difference between the hind feet is R, the phase differences between the diagonal pairs of legs are D1 and D2. B: plot of Tdiff measured from the high-speed video vs. 3S, where Tdiff = R − max(D1, D2). Markers denote the running speed, V, at the time of observation. The dotted line marks the boundary between asymmetric and symmetric gaits (in the 3S sense) at 0.17.