Pfeufer D, et al. - Experts conducted a systematic review to assess how biofeedback affects clinical outcomes in patients with unilateral total knee arthroplasty (TKA). After reviewing the current literature regarding methods, devices and effects of biofeedback in patients who underwent total knee arthroplasty, results indicate the efficacy of biofeedback in early postoperative rehabilitation after TKA for improving gait symmetry, reducing pain, and increasing activity level. Comparisons between studies were limited due to the great variety of devices used for feedback. Visual feedback was the most common type, followed by audio; one study mentioned that the audio mode was preferred by the patients as it was easier to handle. A possible value for improving mobility and lessening pain was seen with 5 out of 6 different methods.