Fig. 2From: Lower limb joint motion and muscle force in treadmill and over-ground exerciseKnee flexion angles in treadmill and over-ground exercises. a Knee flexion angles during walking at 100 and 120 steps/min. b Knee flexion angles during running at 140 and 160 steps/min. c Sagittal motion range of knee joint in walking. d Sagittal motion range of knee joint in runningBack to article page