Kinect Azure–Based Accurate Measurement of Dynamic Valgus Position of the Knee—A Corrigible Predisposing Factor of Osteoarthritis

(1) Dynamic knee valgus is a predisposing factor for anterior cruciate ligament rupture and osteoarthritis. The single-leg squat (SLS) test widely used movement pattern in clinical practice that helps to assess the risk of lower-limb injury. We aimed quantify SLS using marker-less optical system. (2) Kinect validity accuracy during were established by marker-based OptiTrack MVN Xsens motion capture systems. Then, 22 individuals with moderate symptoms sports activities (Tegner > 4, Lysholm 60) performed SLS, this was recorded analyzed Azure camera Dynaknee software. (3) An sensor coupled an artificial-intelligence-based joint recognition algorithm gave comparable result traditional devices. dynamic sign quantified Q-angle at lowest point highly dependent on depth, which severely limits its comparability among subjects. In contrast, medio-lateral shift midpoint fixed expressed percentage lower limb length, more suitable compare values individual patients. (4) current study identified new reliable way evaluating measuring medial knee-over-foot standardized depth. Using system widens possibilities functional instabilities medical professionals.