Figure 1: Predicting the relationship between gait kinematics and Froude number.
Log-log plots of (a) duty factor (DF), (b) stride frequency (fstride, Hz) (c) stance duration (tstance, s) and (d) swing duration (tswing, s) plotted against body mass (Mb) taken from the literature. Kinematic data are shown for a variety of birds walking on treadmills7 at different Froude numbers (grey circles, grey lines) from 0.1 (dashed lines) to 0.5 (dotted and dashed lines) in 0.1 increments. Existing data for mammals1,3,8 (black circles, black solid lines) and birds2 (black triangles, black dashed line) walking at self-selected speeds are shown for comparison.
