Regarding motion tracking, medical applications were explored in the academy soon after the first devices
appeared, as soon as in the 1980s.29 By far, the most common device within this research field is Microsoft Kinect,
which has been used for a variety of applications including assessment of postural control,30 evaluation of foot
posture,31 identifying anterior cruciate ligament injury risk32 and again for in-clinic and in-home physical
rehabilitation33,34 and for enhancing mobility and reducing the risk of falling with gait tracking.35 Besides Kinect,
Leap Motion has also been used for hand rehabilitation,36 and specific devices such as smart gloves have been
developed for improving hand and upper extremity function.37 The use of other motion-tracking tools for physical
rehabilitation has also been surveyed,38 and in cases as preventing cognitive decline results better than with
traditional exercise have been achieved.