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Calcif Tissue Int. 2000 Jul;67(1):10-8.

Systematic review of randomized trials of the effect of exercise on bone mass in pre- and postmenopausal women.

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  • 1Department of Public Health and Community Medicine, University of Sydney, NSW, Australia.

Abstract

Studies of the effect of exercise programs on bone mass appear inconsistent. Our objective was to systematically review and meta-analyze randomized trials of the effect of exercise on bone mass in pre- and postmenopausal women. A computerized MEDLINE search was conducted for the years 1966-1997. Thirty-five randomized trials were identified. Meta-analytic methods were used to statistically pool results of studies of the effect of impact (e.g., aerobics) and non-impact (e.g., weight training) exercise on the lumbar spine and femoral neck. The most studied bone site was the lumbar spine in postmenopausal women (15 studies), where both impact [1.6% bone loss prevented, 95% confidence intervals (CI): 1.0%-2.2%] and non-impact (1.0%, 95% CI: 0.4%-1.6%) exercise programs had a positive effect. Results for the lumbar spine in premenopausal women (eight studies) were similar: 1.5% (95% CI: 0.6%-2.4%) less bone loss (or net gain) after impact exercise and 1.2% (95% CI: 0.7%-1.7%) after non-impact exercise. Impact exercise programs appeared to have a positive effect at the femoral neck in postmenopausal women (five studies), 1.0% (95% CI: 0.4%-1.6%) bone loss prevented, and possibly in premenopausal women, 0.9% (95% CI: -0.2%-2.0%) bone loss prevented. There were too few trials to draw conclusions from meta-analyses of the effect of non-impact exercise on the neck of femur. This systematic review of randomized trials shows that both impact and non-impact exercise have a positive effect at the lumbar spine in pre- and postmenopausal women. Impact exercise probably has a positive effect at the femoral neck. More studies are required to determine the optimal intensity and type of exercise.

PMID:
10908406
[PubMed - indexed for MEDLINE]
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