ImmersiveValidMovement: Validatie van consumenten-XR voor verantwoorde fysiotherapie oefeningen

In physiotherapy, there is a wish to use immersive experiences (IX) such as XR serious games both to motivate patients and to help them perform exercises correctly. To this end, VerseUS Games has developed XR exercise formats that use the built-in sensors of consumer XR headsets (such as Meta Quest and Pico) to record patients' movements. However, it is unclear to what extent these data are reliable and valid enough to assess clinically relevant joint angles, particularly in patients with complex shoulder complaints. ImmersiveValidMovement therefore focuses primarily on "new methodological approaches to measuring usability and effectiveness of IX". We develop and validate methods to derive movements of the head, neck, shoulder and elbow from XR sensor data (headset and hand controllers) and to assess their reliability. We do not develop new IX software or hardware, but work with existing VerseUS games and consumer XR headsets. The emphasis is on measurement methods, analysis techniques and responsible use. In work package 1 (the first three months) we carry out the preparatory work. Together with physiotherapists (FlevoFysiotherapie) we specify which joint angles and variables matter for correctly performing the prescribed exercise (position, speed, acceleration; in a global coordinate system and/or relative to body segments). VerseUS Games provides the XR environment and does the technical work to export the data collection from the headset in time-synchronised form. UMCG provides the research protocol, arranges ethical approval and has the research labs required to conduct the study. In work package 2 we then carry out the validation study, in which the XR measurements are compared with the gold standard (for example Vicon or Optotrak) available at UMCG. Reliability and validity are determined using, among other things, ICC, Bland-Altman plots, correlations and RMSE. Based on this research, UMCG will deliver a report on the validity and reliability of the VerseUS XR exercises as measured by the sensors in the commercial headsets. This provides the basis for further development.