Figure 1

System setup. A) Schematic system setup (view from above): The Kinect sensor (K) was positioned 140 cm above ground, angled -9° towards the floor. Starting (S) about 2 metres in front of the beam path (light blue area), subjects walked with maximum speed towards the Kinect camera (red arrow). Recording started and stopped automatically as sensors detected the subjects entering and leaving the detection zone (dark blue area). B) Sample screenshot of a healthy subject during the test with skeleton projection (green lines). The hip-centre joint (marked as red dot) was used as the data source for analysis. C) Sample data from single healthy subject after normalization. At the position of the red arrow a measurement frame was removed due to a detected calibration jump.