This is not the most recent version of the article. View current version (6 JUL 2011)
Exercise for preventing and treating osteoporosis in postmenopausal women
Editorial Group: Cochrane Musculoskeletal Group
Published Online: 22 APR 2002
Assessed as up-to-date: 26 FEB 2002
Copyright © 2009 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.
How to Cite
Bonaiuti D, Shea B, Iovine R, Negrini S, Welch V, Kemper HHCG, Wells GA, Tugwell P, Cranney A. Exercise for preventing and treating osteoporosis in postmenopausal women. Cochrane Database of Systematic Reviews 2002, Issue 2. Art. No.: CD000333. DOI: 10.1002/14651858.CD000333.
- Publication Status: Edited (no change to conclusions)
- Published Online: 22 APR 2002
This is not the most recent version of the article. View current version (06 JUL 2011)
Osteoporosis is a condition resulting in an increased risk of skeletal fractures due to a reduction in the density of bone tissue. Prevention of osteoporotic-related fractures is dependent on the ability to detect low bone mass within individuals, including women who are asymptomatic. Treatment of osteoporosis involves the use of either anti-resorptive (e.g. estrogen, bisphosphonate) or bone formation agents (e.g. fluoride, parathyroid hormone). The value of exercise as an intervention for the prevention of postmenopausal bone loss is a controversial subject.
To examine the effectiveness of exercise therapy in preventing bone loss and fractures in postmenopausal women.
We searched the Cochrane Musculoskeletal Group trials register, the Cochrane Controlled Trials Register MEDLINE, EMBASE, Current Contents up to January 2000, according to the methods suggested by Dickersin 1994 and Haynes 1994 and the Cochrane Handbook. We hand searched reference lists and consulted content experts.
This review was preceded by a peer reviewed protocol published in the Cochrane Library. Two reviewers independently selected all randomized controlled trials (RCTs) that met our predetermined inclusion criteria.
Data collection and analysis
The same two reviewers abstracted the data using predetermined forms and assessed trial quality using a validated assessment tool. For dichotomous outcomes (fractures), relative risks were calculated using fixed effects models. For continuous data, weighted mean differences (WMD) of the percentage change from baseline were calculated. Where heterogeneity existed (determined by a chi square test), a random effects model was used.
Eighteen randomized controlled trials (RCTs) met the inclusion criteria. The trials had a mean methodological quality score of 2.53. Aerobics, weight bearing and resistance exercises were all effective on the BMD of the spine. The WMD for the combined aerobics and weight bearing program on the spine was 1.79 [95%CI (0.58, 3.01)]. The analyzed results showed walking to be effective on both BMD of the spine 1.31[95%CI (-0.03, 2.65) and the hip 0.92[95%CI (0.21, 1.64). Aerobic exercise was effective in increasing BMD of the wrist 1.22[95%CI (0.71, 1.74)].
Aerobics, weight bearing and resistance exercises are all effective in increasing the BMD of the spine in postmenopausal women. Walking is also effective on the hip. The quality of the reporting of the trials in the meta-analysis was low, in particular, in the areas of allocation concealment and blinding.
Plain language summary
The role of exercise in preventing bone loss in postmenopausal women remains unclear.
The value of exercise as an intervention for the prevention of postmenopausal bone loss is still a controversial subject. The purpose of this systematic review was to examine the effectiveness of exercise for preventing bone loss in women with postmenopausal osteoporosis. We concluded that exercise therapy, in particular weight bearing exercise, appears to be effective in increasing bone density at the lumbar spine and hip in postmenopausal women. The impact of exercise on bone density in the wrist is unclear at this time. Based on the results of one study, exercise does not appear to prevent fractures in postmenopausal women during the first two years of exercise.