Design of an exergame system for knee osteoarthritis rehabilitation based on the exercise prescription.

Exercise therapy is an important rehabilitation method for knee osteoarthritis (KOA) patients. This paper developed an exercise game(exergame) system based on Azure Kinect to help KOA patients accurately perform exercise prescriptions and improve their compliance with active exercise. The proposed system digitizes the KOA exercise prescription formulated by the physician and designs a personalized exergame, guiding the KOA patients to perform the correct rehabilitation exercise. Besides, the system employs the Azure Kinect to collect the user's main joint position information and assist in recognizing the user's rehabilitation training actions. We recruited 3 rehabilitation physicians and 30 KOA patients (experimental group: 20, control group: 10) to conduct a clinical trial aimed at evaluating the usability of the system and user satisfaction. Based on the data recorded by the system and evaluations conducted by the physicians, we found that the experimental group demonstrated an impressive accuracy rate of 97.47% in executing actions, which was significantly higher than the control group. These results demonstrate the effectiveness of the system in guiding the rehabilitation training of KOA patients. The system achieved an accuracy of 95.42% for action recognition, demonstrating that the exergame is reliably interactive. According to the analysis of the UEQ-S questionnaire, the average satisfaction score of the experimental group with the system was (1.68±0.893). These results indicate that the system is capable of providing an exceptional user experience, ultimately increasing patients' willingness and compliance to engage in active exercises. The above experiments confirmed that the proposed exergame system has high usability and an ideal user experience and is suitable for home active exercise therapy for KOA patients. [ABSTRACT FROM AUTHOR]