The Influences of Eccentric Hamstring Strength And Stiffness On Jump Landing Biomechanics

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Last Modified
  • March 19, 2019
Creator
  • Dewig, Derek
    • Affiliation: College of Arts and Sciences, Department of Exercise and Sport Science
Abstract
  • Anterior Cruciate Ligament (ACL) injury risk can be assessed during landing tasks. Greater hamstrings stiffness is associated with better landing biomechanics, but is difficult to assess in the clinical setting. Because eccentric hamstring strength can easily be assessed in the clinical setting, the purpose of this study was to examine relationships between eccentric hamstring strength, hamstring stiffness, and landing biomechanics. Eccentric hamstring strength, hamstring stiffness, and lower extremity kinematic and kinetic during double- and single-leg landing tasks were assessed in 34 healthy, physically active participants. Correlations between eccentric strength and each biomechanical outcome were evaluated via Pearson correlations. Greater peak eccentric strength was associated with lesser vGRF in both landing conditions and with lesser internal varus moment in the single-leg landing condition. There was no significant association between eccentric strength and stiffness. These findings suggest eccentric hamstring strength is not an acceptable clinical estimate of hamstring stiffness nor landing biomechanics.
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  • In Copyright
Advisor
  • Pietrosimone, Brian
  • Blackburn, J. Troy
  • Goodwin, F. Johnathon
Degree
  • Master of Arts
Degree granting institution
  • University of North Carolina at Chapel Hill Graduate School
Graduation year
  • 2016
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