Gait analysis was performed at the M²OCEAN movement analysis laboratory (Multidisciplinary Motor Centre Antwerp, University of Antwerp, Antwerp, Edegem). VICON analysis system (©Vicon Motion Systems Ltd., London, UK) which is the golden standard for 3D motion analysis. Eight infrared automated cameras (Vicon T10 cameras, 100 fps, 1 Megapixel) measured the 3D coordinates of reflective motion trackers. Two video cameras recorded the walking pattern of the participants in the sagittal and frontal plane. In addition, initial contact and toe off were measured based on the ankle trajectories of the reflective markers together with 3 AMTI type OR 6-7 force plates (1000 fps, 46x50x8 cm) and 1 AccuGait® (1000 fps) force plate recordings. Subsequently, the movement analysis lab is equipped with a 16 channel telemetric wireless electromyographic (EMG) system (Arion Zerowire) which measures muscle activity. Recordings where analysed using the Vicon Nexus 1.8.5. software. Step time parameters and gait kinematics were filtered (Butterworth filter) and further processed in Matlab® (The MathWorks, Inc., Natick, Massachusetts, U.S.A.).