Kinematic Analysis of Hip Retrotorsion during Stair Descent in Adults

Abstract

Background: Gait patterns resulting from femoral torsion can lead to gait disorders or early degenerative arthritis.The purpose of this study was to conduct a kinematic analysis of adults with hip retrotorsion when walking down stairs.Methods: Ten students with hip retrotorsion were selected from 230 healthy men and women, and 30 were selected as the normal group by random sampling, excluding those with hip antetorsion and hip retrotorsion. The Wilcoxon code rank test was used to compare the left and right hip joints of the affected and non-affected sides in both the hip retrotorsion and normal groups.Results: Significant differences were seen in the joints at several studied angles due to varying increases and decreases between the affected and non-affected sides in the hip retrotorsiongroup(p < .05).However,the hip and ankle-joint ranges of motion and the maximum and minimum angles in the sagittal, frontal, and transverse planes showed no significant differences between the left and right sides of the hip joint in the normal group (p > .05).Conclusions: Young adults with hip retrotorsion showed more flexion than extension of the hip joint in the sagittal plane during stair descent. In the frontal and transverse planes, the affected side of the hip retrotorsion group showed lower hip internal rotation and higher hip abduction, ankle eversion than those on the non-affected side.