Document Detail

Effects of different impact exercise modalities on bone mineral density in premenopausal women: a meta-analysis.
MedLine Citation:
PMID:  20013013     Owner:  NLM     Status:  MEDLINE    
Our objective was to assess the effects of differing modes of impact exercise on bone density at the hip and spine in premenopausal women through systematic review and meta-analysis. Electronic databases, key journals and reference lists were searched for controlled trials investigating the effects of impact exercise interventions on lumbar spine (LS), femoral neck (FN) and total hip (TH) bone mineral density (BMD) in premenopausal women. Exercise protocols were categorised according to impact loading characteristics. Weighted mean difference (WMD) meta-analyses were undertaken. Heterogeneity amongst trials was assessed. Fixed and random effects models were applied. Inspection of funnel plot symmetry was performed. Trial quality assessment was also undertaken. Combined protocols integrating odd- or high-impact exercise with high-magnitude loading (resistance exercises), were effective in increasing BMD at both LS and FN [WMD (fixed effect) 0.009 g cm(-2) 95% CI (0.002-0.015) and 0.007 g cm(-2) 95% CI (0.001-0.013); P = 0.011 and 0.017, respectively]. High-impact only protocols were effective on femoral neck BMD [WMD (fixed effect) 0.024 g cm(-2) 95% CI (0.002-0.027); P < 0.00001]. Funnel plots showed some asymmetry for positive BMD outcomes. Insufficient numbers of protocols assessing TH BMD were available for assessment. Exercise programmes that combine odd- or high-impact activity with high-magnitude resistance training appear effective in augmenting BMD in premenopausal women at the hip and spine. High-impact-alone protocols are effective only on hip BMD in this group. However, diverse methodological and reporting discrepancies are evident in published trials.
Marrissa Martyn-St James; Sean Carroll
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Publication Detail:
Type:  Journal Article; Meta-Analysis; Review     Date:  2009-12-15
Journal Detail:
Title:  Journal of bone and mineral metabolism     Volume:  28     ISSN:  1435-5604     ISO Abbreviation:  J. Bone Miner. Metab.     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-05-10     Completed Date:  2010-08-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9436705     Medline TA:  J Bone Miner Metab     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  251-67     Citation Subset:  IM    
Carnegie Faculty of Sport and Education, Leeds Metropolitan University, Leeds, UK.
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MeSH Terms
Bone Density / physiology*
Exercise Movement Techniques*
Exercise Therapy / methods*
Femur Neck / chemistry
Lumbar Vertebrae / chemistry
Middle Aged
Osteoporosis / prevention & control
Premenopause / physiology*
Resistance Training
Stress, Physiological
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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