2.3.1. Daily physical activity.
Daily physical activity was assessed using a small, body-worn, single-axis, accelerometer-based activity monitor. The start and duration of monitoring were preset, and the monitor was attached to the patients’ non-operated thigh using double-sided hydrogel adhesive pads and covered with waterproof tape. The monitor was worn continuously for 24 hours a day for 7 days. Activity monitoring data from midnight after surgery and 6 consecutive days were used for analysis.Physical activity was reported as time mobilized, meaning the time the patient spent standing or stepping, and the daily number of steps for the first 6 postoperative days.The activPAL