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Prospective associations between ambulatory activity, body composition and muscle function in older adults

Citation

Scott, D and Blizzard, L and Fell, J and Jones, G, Prospective associations between ambulatory activity, body composition and muscle function in older adults, Scandinavian Journal of Medicine and Science in Sports, 2010 EJ ISSN 0905-7188 (2010) [Refereed Article]


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The definitive published version is available online at: http://onlinelibrary.wiley.com/

Official URL: http://onlinelibrary.wiley.com/

DOI: doi:10.1111/j.1600-0838.2010.01229.x

Abstract

To describe prospective associations between ambulatory activity (AA), body composition and muscle function in older adults, 697 community-dwelling participants (49% female; mean age562  7 years) were assessed for changes in body fat and leg lean mass using dual-energy x-ray absorptiometry, leg strength using dynamometer, and whole body muscle quality (WBMQ; an estimate of specific force) over 2.6  0.4 years. AA was negatively associated with fat mass in both sexes but baseline AA did not predict change in fat mass. Habitual AA was weakly, but significantly, negatively associated with change in total body fat (0.16 kg/step  103/day, P50.011) and trunk fat (0.12 kg/step  103/day, P50.044) in men. Habitual AA was also weakly, but significantly, positively associated with change in leg lean mass in both men and women (both Po0.05), as well as change in leg strength (1.37 kg/ step  103/day, P50.001) and WBMQ (0.03 kg/kg/ step  103/day, P50.002) in women only. Partial R2s for these associations were in the range of 1.2–3.2%. Although, these associations are modest, increases in objectively assessed physical activity may represent a target for improving body composition and muscle function in community- dwelling older adults.

Item Details

Item Type:Refereed Article
Keywords:pedometer, exercise, body fat, muscle strength
Research Division:Medical and Health Sciences
Research Group:Clinical Sciences
Research Field:Rheumatology and Arthritis
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Skeletal System and Disorders (incl. Arthritis)
Author:Scott, D (Mr David Scott)
Author:Blizzard, L (Professor Leigh Blizzard)
Author:Fell, J (Associate Professor James Fell)
Author:Jones, G (Professor Graeme Jones)
ID Code:66014
Year Published:2010
Web of Science® Times Cited:17
Deposited By:Menzies Institute for Medical Research
Deposited On:2010-12-15
Last Modified:2012-01-18
Downloads:0

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