Activity energy expenditure and change in body composition in late life  

Oleh:

Manini, Todd M. ; Everhart, James E ; Anton, Stephen D ; Schoeller, Dale A.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: The American Journal of Clinical Nutrition vol. 90 no. 05 (Nov. 2009), page 1336-1342..
Topik: 1999 election; PEMILU TH. 1999; HEALTH AND NUTRITION; Aging

Ketersediaan

Perpustakaan FK Nomor Panggil: A07.K.2009.03 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Background: Change in body composition, specifically loss of fat-free mass and gain in fat mass, in older adults is a major pathway leading to the onset of functional decline and physical disability. Objective: The objective was to determine the association of activity-related energy expenditure with change in body mass and composition among older men and women. Design: Total energy expenditure (TEE) was assessed over 2 wk by using the doubly labeled water method in 302 community-dwelling older adults aged 70–82 y. Resting metabolic rate (RMR) was measured by using indirect calorimetry, and the thermic effect of meals was estimated at 10% of TEE. Activity energy expenditure (AEE) was calculated as [TEE(0.9) – RMR]. Total body mass, fat-free mass (FFM), and fat mass (FM) were assessed by dual-energy X-ray absorptiometry annually over a mean (±SD) of 4.9 ± 1.3 y. Results: In multivariate models adjusted for baseline age, smoking status, and race, men and women had a decline (in kg/y) in body mass (men: –0.34, 95% CI: –0.71, 0.02; women: –0.45, 95% CI: –0.71, –0.19) and FFM (men: –0.48, 95% CI: –0.67, –0.29; women: –0.14, 95% CI: –0.026, –0.03). No changes (in kg/y) were observed in FM (men: 0.14, 95% CI: –0.10, 0.38; women: –0.28, 95% CI: –0.49, –0.07). In men and women, higher AEE at baseline was associated with greater FFM. The average change in these outcomes (ie, slope), however, was similar across tertiles of AEE. Conclusions: These data suggest that accumulated energy expenditure from all physical activities is associated with greater FFM, but the effect does not alter the trajectory of FFM change in late life.

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