Document Detail

Proximal tibia volumetric bone mineral density is correlated to the magnitude of local acceleration in male long-distance runners.
MedLine Citation:
PMID:  20133440     Owner:  NLM     Status:  MEDLINE    
The beneficial effect of physical exercise on bone mineral density (BMD) is at least partly explained by the forces exerted directly on the bones. Male runners present generally higher BMD than sedentary individuals. We postulated that the proximal tibia BMD is related to the running distance, as well as to the magnitude of the shocks (while running) in male runners. A prospective study (three yearly measurements) included 81 healthy male subjects: 16 sedentary lean subjects, and 3 groups of runners (5-30 km/wk, n = 19; 30-50 km/wk, n = 29; 50-100 km/wk, n = 17). Several measurements were performed at the proximal tibia level: volumetric BMD (vBMD) and cortical index (CI), i.e., an index of cortical bone thickness and peak accelerations (an index of shocks during heel strike) while running (measured by a three-dimensional accelerometer). A general linear model assessed the prediction of vBMD or CI by 1) simple effects (running distance, peak accelerations, time); and 2) interactions (for instance, if vBMD prediction by peak acceleration depends on running distance). CI and vBMD 1) increase with running distance to reach a plateau over 30 km/wk; and 2) are positively associated with peak accelerations over 30 km/wk. Running may be associated with high peak accelerations to have beneficial effects on BMD. More important strains are needed to be associated with the same increase in BMD during running sessions of short duration than those of long duration. CI and vBMD are associated with the magnitude of the shocks during heel strike in runners.
Olivier Dériaz; Bijan Najafi; Pierluigi Ballabeni; Antoinette Crettenand; Charles Gobelet; Kamiar Aminian; René Rizzoli; Gerald Gremion
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-02-04
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  108     ISSN:  1522-1601     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-08-17     Completed Date:  2010-11-16     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  852-7     Citation Subset:  IM    
Institut de Recherche en Réadaptation et Clinique Romande de Réadaptation, SUVAcare, Sion, Switzerland.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Bone Density / physiology*
Exercise / physiology*
Oxygen Consumption
Physical Exertion
Running / physiology*
Sedentary Lifestyle
Tibia / anatomy & histology*,  metabolism*,  radiography

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

Previous Document:  Effect of 2-wk intensified training and inactivity on muscle Na+-K+ pump expression, phospholemman (...
Next Document:  Serotonergic projection from nucleus raphe pallidus to rostral ventrolateral medulla modulates cardi...