Is a decrease of grip strength associated with community mobility restriction in dynapenic older women?

Margaux Blamoutier, Patrick Boissy, Simon Brière, Geneviève Faucher, Martine Lauzé, Christian Duval

Abstract


Background: Absolute grip strength (aGS) is  used to detect dynapenia, and is also an  indicator of functional impairments such as mobility limitations. The objective of this study is to investigate whether dynapenia status assessed by absolute grip strength (aGS) is associated with loss of community mobility.

Method: The population studied (n=62) was composed of  a dynapenic group of women (aged 66.4 ± 4.8) according to an aGS threshold of ≤ 19.9kg and an age-matched group of nodynapenic women (aged 66.1 ± 5.2). The aGS was measured and body-weigth-related to grip strength (BW/GS) was computed. Fonctionnal laboratory tests were conducted. During 12 days, each participant wore a GPS device to obtain Transit distance in vehicle per day, Transit distance on foot per day and Ellipse area.  The Life space (LS) was assessed using the Life Space Assesment questionnaire (LSA). A Wilcoxon test was used to compare the 2 groups for the community mobility measures. Then, data of the 2 groups were pooled to assess the relationship between BW/GS and community mobility measures. A Spearman correlation was used.

Results: The dynapenic group performed worse for fonctionnal capacity tests such as the step test and the walking speed. Howerver, no significant difference was found for GPS measures and LS between the two groups. No significant relationship was found for the BW/GS and community mobility measures with the GPS measures and the LS.  


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References


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DOI: http://dx.doi.org/10.17987/jcsm-cr.v3i1.42

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