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Magnesium intake mediates the association between bone mineral density and lean soft tissue in elite swimmers.
MedLine Citation:
PMID:  23015157     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Magnesium (Mg) deficiency has been associated with bone disorders. Physical activity is also crucial for bone mineralization. Bone mass loss has been observed to be accelerated in subjects with low Mg intake. We aim to understand if Mg intake mediates the association between bone mineral density (BMD) and lean soft tissue (LST) in elite swimmers. Seventeen elite swimmers (eight males; nine females) were evaluated. Bone mineral content, BMD, LST, and fat mass were assessed using dual energy X-ray absorptiometry. Energy and nutrient intake were assessed during a seven-day period and analyzed with Food Processor SQL. Males presented lower values than the normative data for BMD. Mg, phosphorus (P) and vitamin D intake were significantly lower than the recommended daily allowance. A linear regression model demonstrated a significant association between LST and BMD. When Mg intake was included, we observed that this was a significant, independent predictor of BMD, with a significant increase of 24% in the R(2) of the initial predictive model. When adjusted for energy, vitamin D, calcium, and P intake, Mg remained a significant predictor of BMD. In conclusion, young athletes engaged in low impact sports, should pay special attention to Mg intake, given its potential role in bone mineral mass acquisition during growth.
Authors:
Catarina N Matias; Diana A Santos; Cristina P Monteiro; Ana M Vasco; Fátima Baptista; Luís B Sardinha; Maria J Laires; Analiza M Silva
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-27
Journal Detail:
Title:  Magnesium research : official organ of the International Society for the Development of Research on Magnesium     Volume:  -     ISSN:  1952-4021     ISO Abbreviation:  Magnes Res     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8900948     Medline TA:  Magnes Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Exercise and Health Laboratory, Faculty Human Kinetics, Technical University of Lisbon, Estrada da Costa, 1499-002 Cruz-Quebrada, Portugal, CIPER - Interdisciplinary Center for the Study of Human Performance, Faculty Human Kinetics, Technical University of Lisbon, Estrada da Costa, 1499-002 Cruz-Quebrada, Portugal.
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