Document Detail


A 1-y walking program and increased dietary calcium in postmenopausal women: effects on bone.
MedLine Citation:
PMID:  2021138     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of a supervised 1-y walking program and increased dietary calcium (milk supplement, 831 mg/d, vs placebo drink, 41 mg/d) on bones were examined in 36 postmenopausal women (60.2 +/- 6.5 y). Trabecular bone-mineral density (BMD) of the lumbar spine (L1-L3), measured by computed tomography, increased by 0.5% in exercising women (n = 18) and decreased by 7.0% in sedentary women (n = 18; P = 0.02). Femoral-neck BMD measured by dual-photon absorptiometry (DPA) increased by 2.0% in women consuming high dietary calcium (n = 18) and decreased by 1.1% in those on moderate calcium intake (n = 18; P = 0.001). Neither exercise nor dietary calcium had an effect on lumbar spine (L2-L4) measured by DPA, distal radius measured by single-photon absorptiometry, or total body calcium measured by in vivo neutron activation. The varying proportions and rates of turnover of trabecular and cortical bone from one site to another suggest that exercise and high dietary calcium may preferentially alter bone density at different skeletal sites.
Authors:
M E Nelson; E C Fisher; F A Dilmanian; G E Dallal; W J Evans
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  The American journal of clinical nutrition     Volume:  53     ISSN:  0002-9165     ISO Abbreviation:  Am. J. Clin. Nutr.     Publication Date:  1991 May 
Date Detail:
Created Date:  1991-05-24     Completed Date:  1991-05-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0376027     Medline TA:  Am J Clin Nutr     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1304-11     Citation Subset:  AIM; IM    
Affiliation:
Human Physiology Laboratory, US Department of Agriculture Human Nutrition Research Center on Aging, Tufts University, Boston, MA 02111.
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MeSH Terms
Descriptor/Qualifier:
Absorptiometry, Photon
Aged
Analysis of Variance
Bone Density*
Calcium, Dietary / therapeutic use*
Diet
Double-Blind Method
Exercise*
Female
Femur Neck
Humans
Lumbar Vertebrae
Middle Aged
Osteoporosis, Postmenopausal / prevention & control*
Radius
Walking*
Chemical
Reg. No./Substance:
0/Calcium, Dietary

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


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