Document Detail


One-leg stance in healthy young and elderly adults: a measure of postural steadiness?
MedLine Citation:
PMID:  15288454     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: To investigate postural steadiness during 30 s of one-leg stance in healthy young and elderly adults, by analysing the pattern of the ground reaction force variability. DESIGN: A laboratory set-up was used to analyse the variability of the ground reaction forces in relation to time as a measure of postural steadiness. BACKGROUND: The one-leg stance test is a measure considered to assess postural steadiness in a static position by a temporal measurement. The common notion is that a better postural steadiness, i.e. less force variability, allows for longer time standing on one leg. However, there is lack of evidence how postural steadiness during one-leg stance changes over time. METHODS: Twenty-eight healthy elderly and 28 healthy young adults were tested by means of force plates assessing ground reaction forces while performing one-leg stance. RESULTS: During one-leg stance, two phases could be identified in both groups: First a dynamic phase, a rapid decrease of force variability, and thereafter a static phase, maintaining a certain level of force variability. During the first 5 s of one-leg stance the force variability decreased significantly more in the young group resulting in a lower force variability level during the static phase than in the elderly. CONCLUSIONS: The difficulties in maintaining the static position in elderly seems dependent on the reduced initial decrease in force variability and/or musculoskeletal components. We suggest that the first 5 s are crucial when assessing balance during one-leg stance.
Authors:
Erika Jonsson; Ake Seiger; Helga Hirschfeld
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Clinical biomechanics (Bristol, Avon)     Volume:  19     ISSN:  0268-0033     ISO Abbreviation:  Clin Biomech (Bristol, Avon)     Publication Date:  2004 Aug 
Date Detail:
Created Date:  2004-08-03     Completed Date:  2004-10-07     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8611877     Medline TA:  Clin Biomech (Bristol, Avon)     Country:  England    
Other Details:
Languages:  eng     Pagination:  688-94     Citation Subset:  IM    
Affiliation:
Karolinska Institutet, Neurotec Department, Division of Physiotherapy, Motor Control and Physical Therapy Research Laboratory, 23100, 141 83 Huddinge, Sweden. erika.s.jonsson@neurotec.ki.se
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Aged, 80 and over
Data Interpretation, Statistical
Female
Humans
Leg / physiology*
Male
Postural Balance / physiology*
Posture / physiology*
Signal Processing, Computer-Assisted

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


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