Abnormal knee joint position sense in individuals with patellofemoral pain syndrome

Abstract

The purpose of this cross-sectional study was to compare knee joint position sense (JPS) in 20 individuals with and 20 without patellofemoral pain syndrome (PFPS). Five active tests with ipsilateral limb matching responses were performed at 20° and 60° flexion under non-weightbearing conditions, and at 40° flexion under uni- and bi-lateral weightbearing conditions. The response errors were calculated as the difference between each target and response position (accuracy) and the standard deviation of these differences (reliability). JPS was: (i) significantly less accurate and less consistent in the knees with PFPS during both the non-weightbearing and weightbearing tests when compared to the..