Document Detail


Lifestyle factors associated with age-related differences in body composition: the Florey Adelaide Male Aging Study.
MedLine Citation:
PMID:  18614729     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Age-related change in body composition is associated with adverse health outcomes, including functional decline, disability, morbidity, and early mortality. Prevention of age-related changes requires a greater understanding of the associations among age, lifestyle factors, and body composition. OBJECTIVE: We aimed to comprehensively determine lifestyle factors associated with age-related differences in body composition assessed by using dual-energy X-ray absorptiometry. DESIGN: We analyzed baseline (cross-sectional) data collected from 2002 to 2005 for approximately 1200 men in the Florey Adelaide Male Aging Study, a regionally representative cohort of Australian men aged 35-81 y. RESULTS: Mean values for whole-body lean mass (LM) and areal bone mineral density (aBMD) decreased, whereas mean values for abdominal fat mass (FM) and whole-body and abdominal percentage FM (%FM) increased with age. No significant age-related differences were found for whole-body FM. Multiple adjusted odds of being in the highest tertiles for whole-body and abdominal %FM decreased for smokers (63-71%) but increased with age group and for lowest energy (43-50%), carbohydrate (92-107%), and fiber (107%) intake tertiles. Multiple adjusted odds of being in the highest aBMD tertile decreased for lowest body mass (92%) and carbohydrate intake (63%) tertiles and for men aged > or = 75 y (78%) but increased for Australian birth (58%) and for participation in vigorous physical activities (82%). CONCLUSIONS: Age-related differences in body composition indicate that whole-body FM remains stable but increases viscerally and that whole-body %FM is confounded by LM, whereas aBMD decreases with age. Age-related differences in %FM and aBMD are associated with demographic and lifestyle factors.
Authors:
Evan Atlantis; Sean A Martin; Matthew T Haren; Anne W Taylor; Gary A Wittert;
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The American journal of clinical nutrition     Volume:  88     ISSN:  1938-3207     ISO Abbreviation:  Am. J. Clin. Nutr.     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-07-10     Completed Date:  2008-07-31     Revised Date:  2009-05-15    
Medline Journal Info:
Nlm Unique ID:  0376027     Medline TA:  Am J Clin Nutr     Country:  United States    
Other Details:
Languages:  eng     Pagination:  95-104     Citation Subset:  AIM; IM    
Affiliation:
Exercise, Health and Performance Faculty Research Group, Faculty of Health Sciences, University of Sydney, Sydney, Australia. e.atlantis@usyd.edu.au
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MeSH Terms
Descriptor/Qualifier:
Absorptiometry, Photon
Adipose Tissue / metabolism*
Adult
Aged
Aged, 80 and over
Aging / physiology*
Australia
Body Composition / physiology*
Bone Density / physiology*
Cohort Studies
Cross-Sectional Studies
Demography
Diet
Humans
Life Style*
Male
Middle Aged
Muscle, Skeletal / metabolism*
Odds Ratio
Smoking

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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