Document Detail


Dose-response effect of exercise frequency on bone mineral density in post-menopausal, osteopenic women.
MedLine Citation:
PMID:  23190199     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The purpose of this study was to determine the long-term dose-response relationship of exercise frequency on areal bone mineral density (aBMD) in early post-menopausal women with osteopenia. Based on the 12-year results of the consequently supervised exercise group (EG) of the Erlangen Fitness and Osteoporosis Prevention Study, we retrospectively structured two exercise groups according to the overall exercise frequency. Changes in aBMD at lumbar spine and proximal femur as assessed by dual-energy x-ray absorptiometry technique were compared between a low-frequency exercise group (LEF-EG, n = 16) with 1.5-<2 sessions/week and a high-frequency exercise group (HEF-EG, n = 25) with ≥2-3.5 sessions/week. Changes in aBMD at the lumbar spine and proximal femur were significantly more favorable in the HEF-EG compared with the LEF-EG; lumbar spine: (mean value ± standard deviation) 1.1 ± 4.7% vs -4.1 ± 3.0%; P = 0.001, ES: d' = 1.26; total hip: -4.4 ± 3.9% vs -6.7 ± 3.5%, P = 0.045, ES: d' = 0.70). BMD results of the LEF-EG did not significantly differ from the data of the non-training control group (lumbar spine: -4.4 ± 5.2%, total hip: -6.9 ± 5.0%). Although this result might not be generalizable across all exercise types and cohorts, it indicates that to impact bone, an overall exercise frequency of at least 2 sessions/week may be crucial, even if exercise is applied with high intensity/impact.
Authors:
W Kemmler; S von Stengel
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-28
Journal Detail:
Title:  Scandinavian journal of medicine & science in sports     Volume:  -     ISSN:  1600-0838     ISO Abbreviation:  Scand J Med Sci Sports     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9111504     Medline TA:  Scand J Med Sci Sports     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 John Wiley & Sons A/S. Published by Blackwell Publishing Ltd.
Affiliation:
Institute of Medical Physics, University of Erlangen, Erlangen, Germany.
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