Comparison of Physical Activity Training Using Augmented Reality and Conventional Therapy on Physical Performance following a Total Knee Replacement: A Randomized Controlled Trial

There is growing interest in using augmented reality (AR)-based training for rehabilitation programs, while it remains unclear whether physical exercises using AR can be more effective than conventional therapy for patients with total knee replacement (TKR). This study, therefore, aimed to compare the effects of AR-based training to conventional therapist-based training on the physical performance of early-stage rehabilitation in patients after a TKR. It was a double-blind randomized controlled trial with repeated measures (pre-surgery, post-surgery, and post-intervention). Twenty-four participants with TKR were allocated to either AR-based training or therapist-based training. Both groups received a training program for 30 min per session, three sessions per week, for four weeks. The outcome measures included the range of motion (ROM), muscle strength, balance, and perceived pain. The results showed significant improvements in all measured outcomes in both groups (p < 0.05). However, despite our hypothesis that ART would be more effective than the TKR, no significant differences in all the outcomes were found between the two groups. While there was some evidence showing that performing physical exercises using AR could improve physical performance in patients with TKR after surgery, a comparison with conventional therapy did not show superior effectiveness. However, AR could be used to provide real-time feedback and motivation appropriate for home-training programs.