Document Detail

Plantar loading and cadence alterations with fatigue.
MedLine Citation:
PMID:  10613435     Owner:  NLM     Status:  MEDLINE    
PURPOSE: The purpose of this investigation was to identify changes in loading characteristics of the foot associated with fatigue during running. METHODS: Nineteen healthy subjects ranging from 20 to 30 yr (mean = 22.3, SD = 2.4) were equipped with the Pedar in-shoe measurement system (Novel GmbH) for the assessment of plantar loading. After acclimation to the treadmill, subjects were progressed through the Ohio State protocol for exercise testing until fatigue was reported using Borg's RPE scale. Six right footsteps were recorded at 150 Hz for each subject's comfortable running pace under normal and fatigued conditions. A series of repeated measures multiple analysis of variance was performed for all dependent variables analyzed in this study including peak force (PF), force-time integral (FTI), peak pressure (PP), and pressure-time integral (PTI) for all regions of the plantar surface. RESULTS: Decreased step time, significantly smaller values under the heel for PP, PF, FTI, CT, and PTI, and trends toward increased medial forefoot loading were identified while subjects were running under fatigued conditions (alpha < 0.05). CONCLUSION: These results suggest that subjects change running technique and plantar surface loading characteristics in response to fatigued conditions through increased cadence, decreased loading of the heel, and increased medial forefoot loading.
J D Willson; T W Kernozek
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  31     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  1999 Dec 
Date Detail:
Created Date:  2000-01-27     Completed Date:  2000-01-27     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1828-33     Citation Subset:  IM; S    
Department of Physical Therapy, University of Wisconsin-La Crosse, 54601, USA.
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MeSH Terms
Exercise Test
Fatigue / physiopathology*
Foot / physiology*
Gait / physiology*
Running / physiology*
Weight-Bearing / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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