Date of Award

Spring 8-1-2002

Document Type

Thesis

Degree Name

Master of Arts (MA)

Department

Physical Education

First Advisor

Jeffrey E. Edwards

Second Advisor

J. Patrick Babington

Third Advisor

John Ozmun

Abstract

Objective: The purpose of this study was to determine the changes in neuromuscular function through the use of the Hoffman Reflex in male Division I collegiate sprinters during an indoor competitive season. Design: a 2 X 4 factorial design. The independent variables in this study were groups (Sprint and Control) and testing times (base, mid, peak and taper). The dependent variable was the soleus Hreflex, anaerobic power, and body composition. Setting: This study took place in the Exercise Physiology Laboratory located in the Health and Human Performance Building at Indiana State University. Subjects: Ten male Division I collegiate sprinters (age: 19.6±2 yr; mass: 77.19±4.17 kg; height: 180. 7± 2.9 em) and a contrpl group of eleven male volunteers (age: 20.55±2 yr; mass: 75.99±9.11 kg; height: 177.5±7.73 em) Measurements: Supine H-Reflex testing of the Soleus muscle. There was a significant difference in the soleus HIM ratio for the sprint group from peak to taper training (p=0.026). No difference was found in the control group in the soleus HIM ratio. Conclusion: As training volume increased the HIM ratio values decreased. Upon tapering, the HIM ratio increased to its highest levels.

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