Figure 2. Target Positions and Marker Placement.

A Motion capture area as seen from above. The four targets are placed at a distance of 180±10° (inside) and ±30° (outside). The start position was indicated in the real room but the final position of the target was recalculated using the exact location at button-press. B Participants wore 20 infrared markers: One each on the sternoclavicular joint and the lower sternum, *2 on left-right heel, lateral knee and elbow, dorsal hand and acromioclavicular (AC) joint, **4 on left-right, anterior-posterior superior iliac spine (SIS) and head. Walking trajectories were determined by the average SIS marker position.