THE COUPLING BETWEEN PRONATION AND TIBIAL INTERNAL ROTATION IS DIFFERENT IN RUNNER’S WITH ANTERIOR KNEE PAIN

Abstract

The purpose of this study was to compare the coupling of eversion to tibial internal rotation in runners with (n=19) and without anterior knee pain (n=17). This relationship was captured using both the traditional EV-TIR ratio and continuously using vector coding. Using vector coding, runners experiencing AKP were found to have a significantly different coupling relationship between 40 and 50% of stance. In contrary, as a result of using a singular value to describe this coupling relationship, traditional EV-TIR ratios were not sensitive enough to detect these differences. Future studies evaluating this coupling relationship should consider using continuous techniques or calculating the EV-TIR ratio over smaller periods of stance.