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Both resistance and agility training increase cortical bone density in 75- to 85-year-old women with low bone mass: a 6-month randomized controlled trial.
J Clin Densitom 2004; 7(4):390-8JC

Abstract

A randomized, controlled, single-blinded 25-wk prospective study was conducted to compare the effects of group-based resistance and agility training on bone, as measured by both dual-energy X-ray absorptiometry (DXA) and peripheral quantitative computed tomography (pQCT), in older women with low bone mass. Ninety-eight community-dwelling women aged 75-85 yr were randomized to one of three experimental groups: resistance training (n = 32), agility training (n = 34), or stretching (sham exercise) (n = 32). Total hip, femoral neck, and trochanteric bone mineral density (BMD) were measured by DXA. Peripheral QCT measurements were performed at the tibia and radius. The pQCT outcome measures at the shaft regions were cortical bone content, cortical bone cross-sectional area, cortical bone density, and density-weighted polar section modulus (SSI). The pQCT outcome measures at the distal sites were total bone content, total bone cross-sectional area, and total bone density. At trial completion, the agility training group significantly increased cortical bone density by 0.5 +/- 0.2% (SE) at the tibial shaft compared with a 0.4 +/- 0.3% loss in the stretching group. The resistance training group significantly increased cortical bone density (1.4 +/- 0.6%) at the radial shaft compared, with a 0.4 +/- 0.5% loss in the agility training group. No significant between-group differences were observed in the other bone outcome measures (by DXA or pQCT). Future research is needed to determine the mechanism(s) responsible for the observed adaptation of the cortical bone to mechanical loading.

Authors+Show Affiliations

UBC Bone Health Research Group, BC Women's Hospital and Health Centre Osteoporosis Program, Centre for Hip Health, and Faculty of Medicine, School of Human Kinetics, University of British Columbia, Vancouver, BC, Canada.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

15618599

Citation

Liu-Ambrose, Teresa Y L., et al. "Both Resistance and Agility Training Increase Cortical Bone Density in 75- to 85-year-old Women With Low Bone Mass: a 6-month Randomized Controlled Trial." Journal of Clinical Densitometry : the Official Journal of the International Society for Clinical Densitometry, vol. 7, no. 4, 2004, pp. 390-8.
Liu-Ambrose TY, Khan KM, Eng JJ, et al. Both resistance and agility training increase cortical bone density in 75- to 85-year-old women with low bone mass: a 6-month randomized controlled trial. J Clin Densitom. 2004;7(4):390-8.
Liu-Ambrose, T. Y., Khan, K. M., Eng, J. J., Heinonen, A., & McKay, H. A. (2004). Both resistance and agility training increase cortical bone density in 75- to 85-year-old women with low bone mass: a 6-month randomized controlled trial. Journal of Clinical Densitometry : the Official Journal of the International Society for Clinical Densitometry, 7(4), pp. 390-8.
Liu-Ambrose TY, et al. Both Resistance and Agility Training Increase Cortical Bone Density in 75- to 85-year-old Women With Low Bone Mass: a 6-month Randomized Controlled Trial. J Clin Densitom. 2004;7(4):390-8. PubMed PMID: 15618599.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Both resistance and agility training increase cortical bone density in 75- to 85-year-old women with low bone mass: a 6-month randomized controlled trial. AU - Liu-Ambrose,Teresa Y L, AU - Khan,Karim M, AU - Eng,Janice J, AU - Heinonen,Ari, AU - McKay,Heather A, PY - 2004/03/24/received PY - 2004/06/08/revised PY - 2004/06/24/accepted PY - 2004/12/25/pubmed PY - 2005/5/27/medline PY - 2004/12/25/entrez SP - 390 EP - 8 JF - Journal of clinical densitometry : the official journal of the International Society for Clinical Densitometry JO - J Clin Densitom VL - 7 IS - 4 N2 - A randomized, controlled, single-blinded 25-wk prospective study was conducted to compare the effects of group-based resistance and agility training on bone, as measured by both dual-energy X-ray absorptiometry (DXA) and peripheral quantitative computed tomography (pQCT), in older women with low bone mass. Ninety-eight community-dwelling women aged 75-85 yr were randomized to one of three experimental groups: resistance training (n = 32), agility training (n = 34), or stretching (sham exercise) (n = 32). Total hip, femoral neck, and trochanteric bone mineral density (BMD) were measured by DXA. Peripheral QCT measurements were performed at the tibia and radius. The pQCT outcome measures at the shaft regions were cortical bone content, cortical bone cross-sectional area, cortical bone density, and density-weighted polar section modulus (SSI). The pQCT outcome measures at the distal sites were total bone content, total bone cross-sectional area, and total bone density. At trial completion, the agility training group significantly increased cortical bone density by 0.5 +/- 0.2% (SE) at the tibial shaft compared with a 0.4 +/- 0.3% loss in the stretching group. The resistance training group significantly increased cortical bone density (1.4 +/- 0.6%) at the radial shaft compared, with a 0.4 +/- 0.5% loss in the agility training group. No significant between-group differences were observed in the other bone outcome measures (by DXA or pQCT). Future research is needed to determine the mechanism(s) responsible for the observed adaptation of the cortical bone to mechanical loading. SN - 1094-6950 UR - https://www.unboundmedicine.com/medline/citation/15618599/Both_resistance_and_agility_training_increase_cortical_bone_density_in_75__to_85_year_old_women_with_low_bone_mass:_a_6_month_randomized_controlled_trial_ L2 - https://linkinghub.elsevier.com/retrieve/pii/JCD:7:4:390 DB - PRIME DP - Unbound Medicine ER -