Article

Inability to control lower extremity segments in the frontal and transverse
planes resulting in large knee abduction angle and increased internal knee
abduction impulse has been associated with patellofemoral pain (PFP). However,
the influence of hip rotation angles on frontal plane knee joint kinematics and
kinetics remains unclear.
The purpose of this study was to explore how hip
rotation angles are related to frontal plane knee joint kinematics and kinetics
during running. Seventy runners participated in this study. Three-dimensional
marker positions and ground reaction forces were recorded with an 8-camera motion
analysis system and a force plate while subjects ran along a 25-m runway at a
speed of 4m/s. Knee abduction, hip rotation and toe-out angles, frontal plane
lever arm at the knee, internal knee abduction moment and impulse, ground
reaction forces and the medio-lateral distance from the ankle joint center to the
center of pressure (AJC-CoP) were quantified. The findings of this study indicate
that greater hip external rotation angles were associated with greater toe-out
angles, longer AJC-CoP distances, smaller internal knee abduction impulses with
shorter frontal plane lever arms and greater knee abduction angles. Thus, there
appears to exist a conflict between kinematic and kinetic risk factors of PFP,
and hip external rotation angle may be a key factor to control frontal plane knee
joint kinematics and kinetics. These results may help provide an appropriate
manipulation and/or intervention on running style to reduce the risk of PFP.
CI - Copyright (c) 2014 Elsevier B.V. All rights reserved.

Langue : ANGLAIS