Methodological Agreement between Body-Composition Methods in Young Soccer Players Stratified by Zinc Plasma Levels

It is feasible to think that the body composition assessment may be influenced by maturational and zinc status, especially in young athletes, which perform regularly high volume of physical training. In accordance, it seems important to clarify the impact of these factors in body composition assessm...

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Autores principales:	de Oliveira-Junior,Astrogildo Vianna, Casimiro-Lopes,Gustavo, Donangelo,Carmem Marino, Koury,Josely Correa, Farinatti,Paulo de Tarso Veras, Massuça,Luís, Fragoso,Isabel
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2016
Materias:	Body composition Youth Nutrition Methodology Measurement
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100008
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spelling	oai:scielo:S0717-950220160001000082016-05-02Methodological Agreement between Body-Composition Methods in Young Soccer Players Stratified by Zinc Plasma Levelsde Oliveira-Junior,Astrogildo ViannaCasimiro-Lopes,GustavoDonangelo,Carmem MarinoKoury,Josely CorreaFarinatti,Paulo de Tarso VerasMassuça,LuísFragoso,Isabel Body composition Youth Nutrition Methodology Measurement It is feasible to think that the body composition assessment may be influenced by maturational and zinc status, especially in young athletes, which perform regularly high volume of physical training. In accordance, it seems important to clarify the impact of these factors in body composition assessment in athletes, since errors may lead to mistakes in training prescription and diet elaboration, and therefore affect the athletic performance. The objective was to compare (1) different methods of body composition evaluation in young soccer players stratified by zinc plasma levels; and (2) the two reference methods using skinfolds thickness in children (Slaughter's and Lohman's equations), considering the maturation level. In this cross-sectional study, fifty tree young soccer players (13.3±0.7 y) were submitted to blood collection, electric bioimpedance (BIA), dual energy X-ray absorptiometry (DXA), anthropometric measures (body mass, stature and skinfolds thickness (ST)) and hand-wrist X-ray. Body composition evaluation was performed by: DXA, ST (Lohman and Slaughter equations) and BIA (Houtkooper equation) methods. Zinc status provided two groups: Normozincemic and Hypozincemic athletes, determined by cut-off point of 11.0 µmol/L. Significant difference on descriptive data for all participants after zinc status stratification was observed only for plasma zinc concentration; (2) Significant correlations were observed between the assessment methods (fat percentage: r= 0.34 to 0.98 and p<0.001 to 0.013; fat free mass: r= 0.95 to 0.9998 and p<0.001), and lowers correlations were observed when electric impedance was involved; and (3) Bland-Altman plots across methods showed a closer agreement when DXA and ST were compared. In conclusion (1) The ST method was better than BIA to assess the body composition (in young soccer players) when DXA scans are not available; (2) The comparison of models based on ST showed that the best association with the values from DXA were obtained for the Slaughter equation, followed by the Lohman equation using bone age instead of chronological age; and (3) Plasma zinc levels seem not to influence the body composition assessment, which certainly warrants further studies.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.34 n.1 20162016-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100008en10.4067/S0717-95022016000100008
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Body composition Youth Nutrition Methodology Measurement
spellingShingle	Body composition Youth Nutrition Methodology Measurement de Oliveira-Junior,Astrogildo Vianna Casimiro-Lopes,Gustavo Donangelo,Carmem Marino Koury,Josely Correa Farinatti,Paulo de Tarso Veras Massuça,Luís Fragoso,Isabel Methodological Agreement between Body-Composition Methods in Young Soccer Players Stratified by Zinc Plasma Levels
description	It is feasible to think that the body composition assessment may be influenced by maturational and zinc status, especially in young athletes, which perform regularly high volume of physical training. In accordance, it seems important to clarify the impact of these factors in body composition assessment in athletes, since errors may lead to mistakes in training prescription and diet elaboration, and therefore affect the athletic performance. The objective was to compare (1) different methods of body composition evaluation in young soccer players stratified by zinc plasma levels; and (2) the two reference methods using skinfolds thickness in children (Slaughter's and Lohman's equations), considering the maturation level. In this cross-sectional study, fifty tree young soccer players (13.3±0.7 y) were submitted to blood collection, electric bioimpedance (BIA), dual energy X-ray absorptiometry (DXA), anthropometric measures (body mass, stature and skinfolds thickness (ST)) and hand-wrist X-ray. Body composition evaluation was performed by: DXA, ST (Lohman and Slaughter equations) and BIA (Houtkooper equation) methods. Zinc status provided two groups: Normozincemic and Hypozincemic athletes, determined by cut-off point of 11.0 µmol/L. Significant difference on descriptive data for all participants after zinc status stratification was observed only for plasma zinc concentration; (2) Significant correlations were observed between the assessment methods (fat percentage: r= 0.34 to 0.98 and p<0.001 to 0.013; fat free mass: r= 0.95 to 0.9998 and p<0.001), and lowers correlations were observed when electric impedance was involved; and (3) Bland-Altman plots across methods showed a closer agreement when DXA and ST were compared. In conclusion (1) The ST method was better than BIA to assess the body composition (in young soccer players) when DXA scans are not available; (2) The comparison of models based on ST showed that the best association with the values from DXA were obtained for the Slaughter equation, followed by the Lohman equation using bone age instead of chronological age; and (3) Plasma zinc levels seem not to influence the body composition assessment, which certainly warrants further studies.
author	de Oliveira-Junior,Astrogildo Vianna Casimiro-Lopes,Gustavo Donangelo,Carmem Marino Koury,Josely Correa Farinatti,Paulo de Tarso Veras Massuça,Luís Fragoso,Isabel
author_facet	de Oliveira-Junior,Astrogildo Vianna Casimiro-Lopes,Gustavo Donangelo,Carmem Marino Koury,Josely Correa Farinatti,Paulo de Tarso Veras Massuça,Luís Fragoso,Isabel
author_sort	de Oliveira-Junior,Astrogildo Vianna
title	Methodological Agreement between Body-Composition Methods in Young Soccer Players Stratified by Zinc Plasma Levels
title_short	Methodological Agreement between Body-Composition Methods in Young Soccer Players Stratified by Zinc Plasma Levels
title_full	Methodological Agreement between Body-Composition Methods in Young Soccer Players Stratified by Zinc Plasma Levels
title_fullStr	Methodological Agreement between Body-Composition Methods in Young Soccer Players Stratified by Zinc Plasma Levels
title_full_unstemmed	Methodological Agreement between Body-Composition Methods in Young Soccer Players Stratified by Zinc Plasma Levels
title_sort	methodological agreement between body-composition methods in young soccer players stratified by zinc plasma levels
publisher	Sociedad Chilena de Anatomía
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100008
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_version_	1718444946140168192

Methodological Agreement between Body-Composition Methods in Young Soccer Players Stratified by Zinc Plasma Levels

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