Faculty Collaboration Database

Hip External Rotator Strength Is Associated With Better Dynamic Control of the Lower Extremity During Landing Tasks. J Strength Cond Res 2016 Jan;30(1):282-91

Date

06/26/2015

Pubmed ID

26110347

Pubmed Central ID

PMC5102255

DOI

10.1519/JSC.0000000000001069

Scopus ID

2-s2.0-84953896818 (requires institutional sign-in at Scopus site)   46 Citations

Abstract

The purpose of this study was to determine the association between hip strength and lower extremity kinematics and kinetics during unanticipated single-leg landing and cutting tasks in collegiate female soccer players. Twenty-three National Collegiate Athletic Association division I female soccer players were recruited for strength testing and biomechanical analysis. Maximal isometric hip abduction and external rotation strength were measured using a hand-held dynamometer and expressed as muscle torque (force × femoral length) and normalized to body weight. Three-dimensional lower extremity kinematics and kinetics were assessed with motion analysis and force plates, and an inverse dynamics approach was used to calculate net internal joint moments that were normalized to body weight. Greater hip external rotator strength was significantly associated with greater peak hip external rotation moments (r = 0.47; p = 0.021), greater peak knee internal rotation moments (r = 0.41; p = 0.048), greater hip frontal plane excursion (r = 0.49; p = 0.017), and less knee transverse plane excursion (r = -0.56; p = 0.004) during unanticipated single-leg landing and cutting tasks. In addition, a statistical trend was detected between hip external rotator strength and peak hip frontal plane moments (r = 0.39; p = 0.06). The results suggest that females with greater hip external rotator strength demonstrate better dynamic control of the lower extremity during unanticipated single-leg landing and cutting tasks and provide further support for the link between hip strength and lower extremity landing mechanics.

Author List

Malloy PJ, Morgan AM, Meinerz CM, Geiser CF, Kipp K

Authors

Christopher Geiser BS,MS Assistant Professor/Athletic Training Director in the Exercise Science department at Marquette University
Kristof Kipp BS,MS,PhD Assistant Professor in the Physical Therapy department at Marquette University
Phillip Malloy in the CTSI department at Medical College of Wisconsin - CTSI

MESH terms used to index this publication - Major topics in bold

Adolescent
Biomechanical Phenomena
Female
Hip Joint
Humans
Kinetics
Knee Joint
Lower Extremity
Muscle Strength
Muscle, Skeletal
Random Allocation
Soccer
Torque
Young Adult