Fig. 1From: Lower limb joint motion and muscle force in treadmill and over-ground exerciseHip flexion angles in treadmill and over-ground exercises. a Hip flexion angles during walking at 100 and 120 steps/min. b Hip flexion angles during running at 140 and 160 steps/min. c Sagittal motion range of hip joint in walking. d Sagittal motion range of hip joint in runningBack to article page