ImmersiveValidMovement: Validatie van consumenten-XR voor verantwoorde fysiotherapie oefeningen

In physiotherapy, there is growing interest in using immersive experiences (IX), such as XR serious games, to motivate patients and 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 track patients' movements. However, it remains unclear how reliable and valid this data is for assessing 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 are developing and validating methods to derive head, neck, shoulder and elbow movements from XR sensor data (headset and hand controllers) and to assess their reliability. We are not developing new IX software or hardware, but working with existing VerseUS games and consumer XR headsets. The focus 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 are relevant for correctly performing the prescribed exercise (position, velocity, acceleration; within a global coordinate system and/or relative to body segments). VerseUS Games provides the XR environment and handles the technical work of exporting time-synchronised data collected from the headset. UMCG oversees the research protocol, arranges ethical approval, and provides the research labs needed to carry out the study. In work package 2, we then carry out the validation study, comparing the XR measurements against the gold standard (such as Vicon or Optotrak) available at UMCG. Reliability and validity are determined using methods including 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 commercial headsets. This report will form the basis for further development.