Grants and Contracts Details
Description
Recent studies have identified dominance-related differences in strengh and function of the
lower extremity, which may be potential risk factors of injury. The purpose of this study is to
evaluate asymmetries of hip abductor strength and endurance between limbs and their
relationships with functional performance. We hypothesize that the dominant leg's hip
abductors will demonstrate greater strength and endurance, and that these enhancements in
muscle function will result in better landing mechanics. To test our hypotheses, subjects will
perform a functional landing task followed by an isometric hip abductor strength test. Functional
performance will be quantified by measuring the peak, and time to peak joint angular
displacements of the hip and knee during the landing phase. Endurance will be evaluated using
EMG in conjunction with an isometric fatigue protocol. Landing mechanics will be reevaluated
following the fatigue protocol. Multiple repeated measures ANOYAs will be used to assess limb
asymmetries in strenb>thand endurance, as well as and pre- and post-fatigue landing mechanics.
Pearson Product Moment correlations will be used to assess the following relationships: I) hip
abductor strength and pre-fatigue functional performance, and 2) hip abductor endurance and the
landing mechanics of the post-fatigue functional tasks. The results of this study can be used
clinically to improve pre-participation screening and the construction of return-to-play guidelines
by highlighting the importance of hip abductor strength and endurance.
Status | Finished |
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Effective start/end date | 7/30/04 → 6/30/05 |
Funding
- NATA Research & Education Foundation: $2,500.00
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