Fig. 3. Representative joint angle patterns normalized to percentage of stride for the (A) hip and (C) knee during level (open) and incline (filled) hopping at 4.2 m s^–1. The shaded region denotes the stance phase. (B) A significant increase in hip extension (P=0.007) produced significantly greater net hip extension (P=0.013) during incline hopping. (D) The knee exhibited significantly less net flexion (P=0.006) during incline hopping due to a significant decrease in initial joint flexion (P=0.021). Initial hip flexion and knee re-extension were not significantly different between level and incline hopping (P=0.108 and P=0.289, respectively). There were no significant differences in average joint angle changes between speeds, and data for 3.3 and 4.2 m s^–1 were pooled. Error bars represent ± 1 s.e.m.