THE EFFECTS OF HIP STRENGTH ON GLUTEAL MUSCLE ACTIVATION AMPLITUDES AND HOW THESE FACTORS PREDICT LOWER EXTREMITY KINEMATICS Public Deposited

Downloadable Content

Download PDF
Last Modified
  • March 21, 2019
Creator
  • Homan, Katie Jo
    • Affiliation: College of Arts and Sciences, Department of Exercise and Sport Science
Abstract
  • Objective: To evaluate the influence of hip strength on kinematic ACL injury risk factors and gluteal activation. Design: Cross-sectional. Setting: Research laboratory. Participants: Eighty-two healthy volunteers. Outcome Measures: Hip extension, external rotation, and abduction strength; gluteus maximus and medius electromyography (EMG); knee valgus, hip adduction, and hip internal rotation angles. Results: Peak knee valgus (p=0.016) and hip external rotation (p=0.023) angles were greater in individuals with weaker hip external rotators. Gluteus maximus EMG was greater in individuals with weaker hip extensors (p=0.031) and external rotators (p=0.043). Hip external rotation strength and gluteus maximus EMG amplitude predicted 7.9% and 12.1% of the variance in peak hip rotation (R= 0.281, p=0.039.) and knee valgus angles (R=0.348, p=0.006). Conclusion: Hip external rotation strength influences hip and knee kinematics related to ACL injury, thus increasing gluteal strength may be an important addition to ACL injury prevention programs. Key Words: ACL, strength, EMG, knee valgus
Date of publication
DOI
Resource type
Rights statement
  • In Copyright
Advisor
  • Blackburn, J. Troy
Degree
  • Master of Arts
Degree granting institution
  • University of North Carolina at Chapel Hill
Graduation year
  • 2011
Language
Publisher
Parents:

This work has no parents.

Items