Postural stability in young and old women

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Abstract

USE OF VARIABILITY, SPEED AND ACCELERATION PARAMETERS TO EVALUATE POSTURAL BALANCE IN OLD VS YOUNG INDIVIDUALS

 

Jørgensen MG1,3, Larsen AH3, Caserotti P2,3, Nielsen OBF1, Aagaard P3

 

1Geriatric Department and Fall Clinic, Aarhus University Hospital, Aalborg Hospital; 2National Institute on Aging, National Institute of Health, Bethesda, MD, USA; 3Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense

 

INTRODUCTION: Poor postural balance control (stability) is one of the major risk factors for falling. If individuals at risk of falling are to be identified at an early stage, good knowledge and sensitive measurements of postural stability are essential. In addition, in order to develop effective intervention strategies such knowledge is of major importance. However, no single postural stability parameter has effectively been able to identify individuals at risk of falling. Hence, there is a strong need for development and identification of sensitive postural sway parameters in various demographic groups. The aim of this study was to explore differences in postural stability between physically active old (O) and young (Y) women using newly developed sway parameters. METHODS AND MATERIALS: Center of pressure (CoP) excursion was measured (100 Hz) by force plate (AMTI) analysis in old (72.5±6.3 years) and young (25.8±1.6 years) women during static 2-leg (bilateral) and 1-leg (unilateral) standing (15-s) with eyes opened. RESULTS: O demonstrated elevated CoP sway length, mean velocity, sway area, confidence ellipse area, velocity and variability in the medio-lateral and anterior-posterior plane compared to Y (p<0.0001-0.01). Further, CoP acceleration was greater in O than Y (p<0.0001-0.01) except in the M-L direction during 2-leg stance. An elevated ratio of bilateral-to-unilateral CoP velocity was observed in O compared to Y (p<0.01), indicating that O had greater relative impairment in unilateral postural stability compared to stable bilateral stance. CONCLUSION: Postural sway parameters were identified (COP M-L & A-P velocity, acceleration, variability and ratio) that could effectively demonstrate differences in postural balance control between physically active old and young women.

Original languageEnglish
Publication date2009
Publication statusPublished - 2009
Externally publishedYes
EventXIXth IAGG World Congress - Paris
Duration: 5 Jul 20099 Jul 2009

Conference

ConferenceXIXth IAGG World Congress
CityParis
Period05/07/200909/07/2009

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