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The association between physical activity and reduced body fat lessens with age - Results from a cross-sectional study in community-dwelling older adults

Citation

Foong, YC and Aitken, D and Winzenberg, T and Otahal, P and Scott, D and Jones, G, The association between physical activity and reduced body fat lessens with age - Results from a cross-sectional study in community-dwelling older adults, Experimental Gerontology, 55 pp. 107-112. ISSN 0531-5565 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Elsevier

DOI: doi:10.1016/j.exger.2014.04.006

Abstract

INTRODUCTION: The aim of this study was to describe the relationship between accelerometer-determined physical activity (PA) and adiposity in community-dwelling older adults. In addition, we were interested in comparing the extent of correlation between questionnaire and accelerometer determined PA. METHODS: 636 community-dwelling older adults (667years) were studied. Adiposity was measured using dual-energy X-ray absorptiometry and BMI was calculated. We measured minutes/day spent in sedentary, light, moderate and vigorous intensity activity using both questionnaires and Actigraph GT1M accelerometers. RESULTS: Participants spent a median of 583(IQR 522-646), 225(176-271), 27(12-45) and 0(0-0) minutes in sedentary, light, moderate and vigorous activities respectively. There was a non linear dose-response inverse relationship between activity intensity and adiposity. After adjusting for age, sex and other levels of PA, for every 10minute increase in activity, total body fat decreased by 169g(95% CI 61-277), 905g(632-1178), and 2208g(759-3657) for light, moderate and vigorous activities respectively. There was an interaction between age and activity; as age increased, the magnitude of the effects of light and moderate activities on adiposity decreased. Sedentary minutes were not associated with adiposity after adjusting for time spent at other PA intensities. Questionnaire measures of PA were weakly correlated with body fat measures when compared to accelerometer determined PA. CONCLUSION: Both the amount and intensity of PA, but not sedentary time, have an independent dose-response association with adiposity. The association is much stronger using objective assessment compared to questionnaire. The magnitude of these associations decrease with age suggesting that physical activity programmes may need to be modified with increasing age.

Item Details

Item Type:Refereed Article
Keywords:physical activity, body fat, older adults
Research Division:Medical and Health Sciences
Research Group:Public Health and Health Services
Research Field:Epidemiology
Objective Division:Health
Objective Group:Specific Population Health (excl. Indigenous Health)
Objective Field:Health Related to Ageing
Author:Foong, YC (Dr Yi Chao Foong)
Author:Aitken, D (Dr Dawn Aitken)
Author:Winzenberg, T (Professor Tania Winzenberg)
Author:Otahal, P (Mr Petr Otahal)
Author:Jones, G (Professor Graeme Jones)
ID Code:91390
Year Published:2014
Web of Science® Times Cited:8
Deposited By:Menzies Institute for Medical Research
Deposited On:2014-05-16
Last Modified:2017-11-03
Downloads:0

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