Effects of a preoperative exercise intervention targeting the non-operated limb in patients scheduled for total knee arthroplasty: a pilot study

Purpose This study aimed to investigate the effects of a preoperative exercise intervention program on physical function in patients with knee osteoarthritis (KOA) scheduled for total knee arthroplasty (TKA). Participants and Methods Twenty-four patients with KOA scheduled for TKA participated in a preoperative exercise program focusing on non-operated limbs. Physical function was evaluated pre- and post-intervention, including knee extension strength (KES), hip abduction strength (HAS), knee range of motion (ROM), pain during activity and at rest (NRS), and performance measures (CS-30, 40 mFWT). Changes were analyzed for statistical significance, and 95% confidence intervals were compared with previously reported MDC95 values. Results Activity-related pain, KES, HAS, knee ROM, and CS-30, and 40 mFWT showed statistically significant changes post-intervention. Changes in activity-related NRS and CS-30 levels exceeded the MDC95. Conclusion Knee joint function and physical performance of patients with KOA scheduled for TKA significantly changed after eight weeks of preoperative exercise program. Changes exceeding the MDC95 in activity-related pain and CS-30 suggest that our exercise program may have enhanced preoperative physical function.