56 patients undergoing total knee arthroplasty were randomized to receive either augmented reality-based (AR) rehabilitation (n=28) or conventional rehabilitation (n=28). The primary outcome of interest was the change in the 4-meter gait speed test scores from baseline to 3 weeks. Secondary outcomes of interest included the 4-m gait speed test at 12 and 24 months, Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores, EuroQoL-5 Dimensions 5-Levels (EQ-5D-5L), pain on a Numeric Rating Scale (NRS), Berg Balance Scale (BBS), total range of motion, quadriceps muscle strength, hamstring strength, and the incidence of adverse events. There were no differences in the change of the 4-m gait speed test and all secondary outcomes between the two groups. There was a significant time effect in the 4-m gait speed, however. All outcomes improved over time in both groups.