The effect of three manipulative treatment protocols on quadriceps muscle strength in patients with Patellofemoral Pain Syndrome

Abstract

Knee joint pathologies, in general, are associated with a loss of knee-extensor muscle strength. This weakness has been attributed to arthrogenic muscle inhibition (AMI). Manipulation of the sacroiliac (SI) has been shown to significantly reduce AMI and increase the strength in the quadriceps muscle group. Although both the knee and SI joints have been linked to AMI of the quadriceps muscle group, no studies have been conducted showing that manipulating the tibio-femoral (knee) joint has any effect on quadriceps muscle strength or AMI. The purpose of this study was therefore to verify whether manipulation of the knee (tibio-femoral) joint is as effective as SI joint manipulation in increasing quadriceps muscle strength in PFPS patients. This study also investigated the effect of combining manipulative therapy of the tibio-femoral and SI joints on quadriceps muscle strength in PFPS patients.