Document Detail

The threshold trip duration for which recovery is no longer possible is associated with strength and reaction time.
MedLine Citation:
PMID:  11311699     Owner:  NLM     Status:  MEDLINE    
The recovery of young adults from trips of increasing severity was studied. Our null hypothesis was that lower extremity strength, and reaction time, step time, step distance and step velocity measured in a volitional stepping task would not explain a significant portion of the variance in the magnitude of the threshold trip duration for which recovery is no longer possible. Ten males and 11 females (average age 26.8 and 28.4 years old, respectively) were subjected to trips of increasing duration until recovery was no longer possible with a single step. The average threshold trip duration for which subjects were no longer able to recover with a single step was 681+/-169ms. The threshold trip duration significantly increased as lower extremity strength increased and volitional reaction time decreased (multiple stepwise linear regression: R(2)=0.52, p=0.001). The other volitional step parameters and the subject characteristics were not significantly associated with the magnitude of the threshold trip duration. These results suggest that some trip-related falls may be due to slower reaction times and/or reduced lower extremity strengths.
C Smeesters; W C Hayes; T A McMahon
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of biomechanics     Volume:  34     ISSN:  0021-9290     ISO Abbreviation:  J Biomech     Publication Date:  2001 May 
Date Detail:
Created Date:  2001-04-20     Completed Date:  2001-07-26     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  United States    
Other Details:
Languages:  eng     Pagination:  589-95     Citation Subset:  IM    
Orthopedic Biomechanics Laboratory, Department of Orthopedic Surgery, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.
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MeSH Terms
Accidental Falls / prevention & control*
Gait / physiology
Leg / physiology
Locomotion / physiology
Models, Biological
Posture / physiology
Grant Support

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