Date of Award

Spring 2009

Document Type

Thesis

Degree Name

Master of Science in Education (MSEd)

Department

Human Movement Sciences

Program/Concentration

Athletic Training

Committee Director

Bonnie L. Van Lunen

Committee Member

James Onate

Committee Member

Joshua Drouin

Call Number for Print

Special Collections; LD4331.E44 D64 2009

Abstract

Eccentric hamstring strength (EHS) and hamstring: quadriceps ratios (H:Q) have been proposed to decrease in those who suffer hamstring injuries after return to play. The purpose of this study was to assess EHS and the three types of H:Q (conventional, functional and inverse functional) at two different velocities. Subjects reported to either the university athletic training room or clinic for a single testing session. We included a sample of convenience of 42 Division I and III collegiate athletes (age= 20.64±1.51 yrs ht= 175.93±10.94 cm; mass= 81.77±18.33 kg) with previous hamstring injury (past 24 months). The Biodex System 3 (Biodex Medical System, Inc., Shirley, NY) was used to complete a total composite of tests: 1) seated eccentric/concentric knee flexion at 60 and 180 deg/sec, 2) seated knee eccentric/concentric extension at 60 and 180 deg/sec, and 3) a seated knee flexion endurance measurement of 30 repetitions at 180 deg/sec. Separate paired-sample t tests were conducted for peak torque per body weight (PT/BW) and total work (TW). Pearson Product Moment Correlations were conducted for H:Q measurements. A 2X2 repeated measures ANOVA was used for endurance comparisons between side and repetition (reps 1-5 vs. reps 26-30). Significance was set a priori at P< .05. There was no significant difference between sides for PT/BW EHS at 60°/sec or 180°/sec. There was no significant difference between sides for TW EI-IS at 60°/sec or 180°/sec. There was no significant difference for all three H:Q between the injured and noninjured limb at 60 and 180 deg/sec. There was a strong correlation between functional H:Q at 60°/sec and conventional H:Q at 60°/sec, and inverse H:Q at 60°/sec, respectively. There was a strong correlation between functional H:Q at 180°/sec and conventional H:Q at 180°/sec and between conventional H:Q at 60°/sec and inverse H:Q at 60°/sec. No other correlations were significant. Endurance comparisons revealed no main effect for side, but a main effect for repetitions. There were no interactions between side and repetition. There were no significant differences for any strength measurement except for TW over time. These strength measures depict that the injured side is comparable to the noninjured side when examining values at approximately nine months from injury. Further research should examine these measures immediately upon return to play.

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In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

DOI

10.25777/hk94-g003

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