Immediate effects of muscular fatigue on postural stability and motoneuron pool excitability in healthy adults

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Publication Type thesis
School or College College of Health
Department Exercise & Sport Science
Author Irvine, Joshua Caleb
Title Immediate effects of muscular fatigue on postural stability and motoneuron pool excitability in healthy adults
Date 2009-05
Description BACKGROUND: The dynamic effect that fatigue plays on acute neuromuscular excitability has been studied at length without arriving at either an accepted explanation or adequate understanding. Researchers agree that the mode by which fatigue is achieved may contribute to the body's response and recovery. Eccentric exercise, as a method by which fatigue is achieved, is commonly incorporated due to its qualities of producing a high muscle strain and low energy expenditure simultaneously. The influence of eccentric-induced fatigue, as it pertains to postural stability and motoneuron pool excitability, is not well understood. PURPOSE: The aim of this study is to investigate the impact of fatigue on motoneuron pool excitability and postural stability in healthy adults. HYPOthesis: Motoneruon pool excitability will be facilitated despite a simultaneous inhibition in postural stability. METHODS: Twelve volunteers (24.4 ± 6.7 yrs; female n=6; male n=6) participated in a single 10-minute bout of eccentric exercise-induced fatigue. H-reflex measurements, used to measure motor pool excitability, and a Limits of Stability (LOS) test, used to quantify postural stability, were administered prior to and immediately following exercise participation. T-tests were utilized to compare eccentric fatigue's effect on the specific neural functions previously delineated. RESULTS: Statistical significance (tn=+2.408, p=0.035) was found on one measure of postural stability, in which there was a facilitation. CONCLUSION: Implications for such findings indicate that eccentric-induced fatigue may more actively be prescribed as part of an appropriate rehabilitation and physical therapy protocol without exposing clients to a risk for increased neuromuscular compromise. Such findings are intended to serve as preparation for extending the investigation to an elderly cohort who may benefit more directly from the integration of eccentric exercise within therapeutic protocols.
Type Text
Publisher University of Utah
Subject Posture; Muscles; Neuromuscular transmission
Dissertation Institution University of Utah
Dissertation Name Honors BS
Language eng
Relation is Version of Digital reproduction of "Immediate effects of muscular fatigue on postural stability and motoneuron pool excitability in healthy adults" J. Willard Marriott Library Special Collections GV8.5 2009 .I78
Rights Management © Joshua Caleb Irvine, © To comply with copyright, the file for this work may be restricted to The University of Utah campus libraries pending author permission.
Format Medium application/pdf
Format Extent 85,658 bytes
Identifier us-etd2,149637
Source Original: University of Utah J. Willard Marriott Library Special Collections
Conversion Specifications Original scanned on Epson GT-30000 as 400 dpi to pdf using ABBYY FineReader 9.0 Professional Edition.
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Date Created 2012-04-23
Date Modified 2018-09-21
ID 192391
Reference URL