Document Detail

Dynamic postural stability during advancing pregnancy.
MedLine Citation:
PMID:  20537334     Owner:  NLM     Status:  MEDLINE    
METHODS: Eighty-one women (41 pregnant, 40 controls) participated stood on a force plate that translated anteroposteriorly at small, medium, and large magnitudes. Reaction time and center of pressure (COP) movement during the translations were analyzed. Trimester, perturbation direction, and perturbation magnitude were the independent variables in a mixed-model analysis of variance on each of the following dependent variables: reaction time, initial sway, total sway, and sway velocity.
RESULTS: Reaction time to the perturbation was not significantly different between the groups. Initial sway, total sway, and sway velocity were significantly less during the third trimester than during the second trimester and when compared to the non-pregnant controls (P<0.05). No differences were found in any of the measures between the pregnant women in their second trimesters and the control group.
CONCLUSION: Alterations in sway responses to perturbations are seen in the third trimester in healthy women with uncomplicated pregnancies. Further study is needed to examine the biomechanical and physiological reasons behind this altered dynamic postural stability.
J L McCrory; A J Chambers; A Daftary; M S Redfern
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of biomechanics     Volume:  43     ISSN:  1873-2380     ISO Abbreviation:  J Biomech     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-08-16     Completed Date:  2010-12-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2434-9     Citation Subset:  IM    
Copyright Information:
2010 Elsevier Ltd. All rights reserved.
Division of Exercise Physiology, Department of Human Performance and Applied Exercise Science, West Virginia University, 8315 Health Sciences Center South, PO Box 9227, Morgantown, WV 26506-9227, USA.
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MeSH Terms
Accidental Falls
Case-Control Studies
Middle Aged
Models, Biological
Postural Balance / physiology*
Posture / physiology*
Pregnancy / physiology*
Pregnancy Trimester, Second
Pregnancy Trimester, Third
Reaction Time / physiology
Young Adult
Grant Support

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

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