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Effect of exercise on extraskeletal risk factors for hip fractures in elderly women with low BMD: a population-based randomized controlled trial.
J Bone Miner Res. 2006 May; 21(5):772-9.JB

Abstract

We conducted a 30-month population-based, randomized, controlled trial in 160 elderly women at risk for fractures on the basis of a low baseline BMD. Mainly home-based weight-bearing exercise was effective in improving strength, balance, and gait.

INTRODUCTION

Evidence on the effect of exercise on extraskeletal risk factors for hip fractures comes mainly from studies in voluntary low-risk women, and no population-based, long-term interventions have been performed in elderly women with low bone mass. The aim of this study was to determine the effect of long-term weight-bearing exercise on balance, muscle strength, and gait in elderly women at risk for fractures on the basis of a low baseline BMD.

MATERIALS AND METHODS

A birth cohort of 1690 women 70-73 years of age were invited to the radius and hip BMD measurements; 96 women were excluded because of medical reasons; 160 women with radius and hip BMD values of >2 SD below the reference value were included in the trial. The participants were randomly assigned to 30 months of impact, balancing, and strengthening exercises or to no intervention. Main outcome measures were body sway length and leg strength at month 30. Secondary endpoints included gait speed, endurance, and grip strength. Outcomes were assessed at 0, 12, 24, and 30 months using blinded operators. Repeated-measures ANOVA was used to determine statistical significance. The analyses were performed on an intention-to-treat basis.

RESULTS

Body sway increased more in the control group than in the exercise group over time (time-group interaction, p < 0.001). Leg strength improved in the exercise group and decreased in the control group (interaction, p < 0.001). A significant time-group interaction (p < 0.001) in favor of the exercise group was found on the following secondary endpoints: the timed up and go test score, walking speed, and distance walked in 2 minutes.

CONCLUSIONS

Weight-bearing exercise is an effective way of modifying extraskeletal risk factors for fractures in elderly women.

Authors+Show Affiliations

Department of Sports Medicine, Deaconess Institute of Oulu, Finland. raija.korpelainen@oulu.fiNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16734393

Citation

Korpelainen, Raija, et al. "Effect of Exercise On Extraskeletal Risk Factors for Hip Fractures in Elderly Women With Low BMD: a Population-based Randomized Controlled Trial." Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research, vol. 21, no. 5, 2006, pp. 772-9.
Korpelainen R, Keinänen-Kiukaanniemi S, Heikkinen J, et al. Effect of exercise on extraskeletal risk factors for hip fractures in elderly women with low BMD: a population-based randomized controlled trial. J Bone Miner Res. 2006;21(5):772-9.
Korpelainen, R., Keinänen-Kiukaanniemi, S., Heikkinen, J., Väänänen, K., & Korpelainen, J. (2006). Effect of exercise on extraskeletal risk factors for hip fractures in elderly women with low BMD: a population-based randomized controlled trial. Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research, 21(5), 772-9.
Korpelainen R, et al. Effect of Exercise On Extraskeletal Risk Factors for Hip Fractures in Elderly Women With Low BMD: a Population-based Randomized Controlled Trial. J Bone Miner Res. 2006;21(5):772-9. PubMed PMID: 16734393.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of exercise on extraskeletal risk factors for hip fractures in elderly women with low BMD: a population-based randomized controlled trial. AU - Korpelainen,Raija, AU - Keinänen-Kiukaanniemi,Sirkka, AU - Heikkinen,Jorma, AU - Väänänen,Kalervo, AU - Korpelainen,Juha, PY - 2006/6/1/pubmed PY - 2006/10/4/medline PY - 2006/6/1/entrez SP - 772 EP - 9 JF - Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research JO - J. Bone Miner. Res. VL - 21 IS - 5 N2 - UNLABELLED: We conducted a 30-month population-based, randomized, controlled trial in 160 elderly women at risk for fractures on the basis of a low baseline BMD. Mainly home-based weight-bearing exercise was effective in improving strength, balance, and gait. INTRODUCTION: Evidence on the effect of exercise on extraskeletal risk factors for hip fractures comes mainly from studies in voluntary low-risk women, and no population-based, long-term interventions have been performed in elderly women with low bone mass. The aim of this study was to determine the effect of long-term weight-bearing exercise on balance, muscle strength, and gait in elderly women at risk for fractures on the basis of a low baseline BMD. MATERIALS AND METHODS: A birth cohort of 1690 women 70-73 years of age were invited to the radius and hip BMD measurements; 96 women were excluded because of medical reasons; 160 women with radius and hip BMD values of >2 SD below the reference value were included in the trial. The participants were randomly assigned to 30 months of impact, balancing, and strengthening exercises or to no intervention. Main outcome measures were body sway length and leg strength at month 30. Secondary endpoints included gait speed, endurance, and grip strength. Outcomes were assessed at 0, 12, 24, and 30 months using blinded operators. Repeated-measures ANOVA was used to determine statistical significance. The analyses were performed on an intention-to-treat basis. RESULTS: Body sway increased more in the control group than in the exercise group over time (time-group interaction, p < 0.001). Leg strength improved in the exercise group and decreased in the control group (interaction, p < 0.001). A significant time-group interaction (p < 0.001) in favor of the exercise group was found on the following secondary endpoints: the timed up and go test score, walking speed, and distance walked in 2 minutes. CONCLUSIONS: Weight-bearing exercise is an effective way of modifying extraskeletal risk factors for fractures in elderly women. SN - 0884-0431 UR - https://www.unboundmedicine.com/medline/citation/16734393/Effect_of_exercise_on_extraskeletal_risk_factors_for_hip_fractures_in_elderly_women_with_low_BMD:_a_population_based_randomized_controlled_trial_ L2 - https://doi.org/10.1359/jbmr.060116 DB - PRIME DP - Unbound Medicine ER -