Fig. 3

Center of pressure trajectories. In the upper panel, the mean center of pressure trajectory ± standard deviation in the medio-lateral direction over the stance phase is presented. The y-axis indicates the normalized distance from the midline of the foot, expressed as a percentage of foot width. In the lower panel, the mean center of pressure trajectory ± standard deviation in the anterior-posterior direction over the stance phase is presented. The y-axis indicates the normalized distance from the most posterior part of the heel, expressed as a percentage of foot length