Fig. 2.

Mean COP M-L location vs biomechanical elements height, according to gait stage. The points represent mean COP for each element (height) at each gait stage. The linear models show that as the height increases (level of instability), the COP moves medially. This effect is similar for every gait stage. COP center of pressure, M-L mediolateral, LR loading response, MS mid-stance, TS terminal stance, PS preswing