Fig. 6. Stride data (mean ± s.e.m. as shading) of changes in total potential energy (PE) during level (blue broken line) and incline (red solid line) galloping at a mean speed of (A) 10 m s^–1 (n level=56 and n incline=60) and (B) 12 m s^–1 (n level=60 and n incline=28). Aerial phase (vertical grey bar); stance phases of individual feet are presented for illustrative purposes as black bars in the lower panels (LF=lead fore; NLF=non-lead fore; LH=non-lead hind; NLH=non-lead hind). Note s.e.m. shading is not clearly visible as the standard errors are small.