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Effect of exercise on bone mineral density and lean mass in postmenopausal women.
Med Sci Sports Exerc 2006; 38(7):1236-44MS

Abstract

PURPOSE

To evaluate the effects of physical activity on bone mineral density, bone mineral content, and lean mass in postmenopausal, overweight/obese women.

METHODS

We conducted a 12-month randomized controlled aerobic exercise intervention versus control in 173 sedentary, overweight/obese, postmenopausal women, aged 50-75 yr. The exercise prescription consisted of >or=45 min of moderate-intensity aerobic exercise (60-75% of maximal heart rate), 5 d.wk for 12 months. Control participants attended 45-min stretching sessions once a week. Ninety-eight percent (N=170) completed the trial. Exercisers averaged 172 min.wk (SD=89) of exercise and expended 3828 kJ.wk (SD=2053). We assessed body fat, total lean mass, and total body bone mineral density and content using dual-energy x-ray absortiometry (DXA). We compared baseline with 12-month changes in exercisers versus controls.

RESULTS

Exercisers lost significantly more weight than stretchers (1.3-kg loss vs 0.1-kg gain, P=0.01). However, no differences between exercisers and controls in the change from baseline to 12 months were detected: exercisers' average bone mineral density increased by 0.005 g.cm and controls' by 0.003 g.cm (P=0.61). Similarly, no significant differences were detected for bone mineral content. Lean mass increased by 0.2 kg in both groups (P=0.84).

CONCLUSION

Overall, the results from this randomized controlled study suggest that a yearlong moderate-intensity aerobic exercise intervention does not affect total body bone mineral density, bone mineral content, or lean mass in overweight/obese postmenopausal women.

Authors+Show Affiliations

Fred Hutchinson Cancer Research Center, Cancer Prevention Research Program, and University of Washington, School of Public Health and Community Medicine, Department of Epidemiology, Seattle, WA 98109-1024, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

16826020

Citation

Chubak, Jessica, et al. "Effect of Exercise On Bone Mineral Density and Lean Mass in Postmenopausal Women." Medicine and Science in Sports and Exercise, vol. 38, no. 7, 2006, pp. 1236-44.
Chubak J, Ulrich CM, Tworoger SS, et al. Effect of exercise on bone mineral density and lean mass in postmenopausal women. Med Sci Sports Exerc. 2006;38(7):1236-44.
Chubak, J., Ulrich, C. M., Tworoger, S. S., Sorensen, B., Yasui, Y., Irwin, M. L., ... McTiernan, A. (2006). Effect of exercise on bone mineral density and lean mass in postmenopausal women. Medicine and Science in Sports and Exercise, 38(7), pp. 1236-44.
Chubak J, et al. Effect of Exercise On Bone Mineral Density and Lean Mass in Postmenopausal Women. Med Sci Sports Exerc. 2006;38(7):1236-44. PubMed PMID: 16826020.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of exercise on bone mineral density and lean mass in postmenopausal women. AU - Chubak,Jessica, AU - Ulrich,Cornelia M, AU - Tworoger,Shelley S, AU - Sorensen,Bess, AU - Yasui,Yutaka, AU - Irwin,Melinda L, AU - Stanczyk,Frank Z, AU - Potter,John D, AU - McTiernan,Anne, PY - 2006/7/11/pubmed PY - 2006/12/9/medline PY - 2006/7/11/entrez SP - 1236 EP - 44 JF - Medicine and science in sports and exercise JO - Med Sci Sports Exerc VL - 38 IS - 7 N2 - PURPOSE: To evaluate the effects of physical activity on bone mineral density, bone mineral content, and lean mass in postmenopausal, overweight/obese women. METHODS: We conducted a 12-month randomized controlled aerobic exercise intervention versus control in 173 sedentary, overweight/obese, postmenopausal women, aged 50-75 yr. The exercise prescription consisted of >or=45 min of moderate-intensity aerobic exercise (60-75% of maximal heart rate), 5 d.wk for 12 months. Control participants attended 45-min stretching sessions once a week. Ninety-eight percent (N=170) completed the trial. Exercisers averaged 172 min.wk (SD=89) of exercise and expended 3828 kJ.wk (SD=2053). We assessed body fat, total lean mass, and total body bone mineral density and content using dual-energy x-ray absortiometry (DXA). We compared baseline with 12-month changes in exercisers versus controls. RESULTS: Exercisers lost significantly more weight than stretchers (1.3-kg loss vs 0.1-kg gain, P=0.01). However, no differences between exercisers and controls in the change from baseline to 12 months were detected: exercisers' average bone mineral density increased by 0.005 g.cm and controls' by 0.003 g.cm (P=0.61). Similarly, no significant differences were detected for bone mineral content. Lean mass increased by 0.2 kg in both groups (P=0.84). CONCLUSION: Overall, the results from this randomized controlled study suggest that a yearlong moderate-intensity aerobic exercise intervention does not affect total body bone mineral density, bone mineral content, or lean mass in overweight/obese postmenopausal women. SN - 0195-9131 UR - https://www.unboundmedicine.com/medline/citation/16826020/Effect_of_exercise_on_bone_mineral_density_and_lean_mass_in_postmenopausal_women_ L2 - http://Insights.ovid.com/pubmed?pmid=16826020 DB - PRIME DP - Unbound Medicine ER -