Prediction equation for lower limbs lean soft tissue in circumpubertal boys using anthropometry and biological maturation.

Lean soft tissue (LST), a surrogate of skeletal muscle mass, is largely limited to appendicular body regions. Simple and accurate methods to estimate lower limbs LST are often used in attempts to partition out the influence of body size on performance outputs. The aim of the current study was to dev...

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Autores principales:	João Valente-dos-Santos, Manuel J Coelho-e-Silva, Aristides M Machado-Rodrigues, Marije T Elferink-Gemser, Robert M Malina, Édio L Petroski, Cláudia S Minderico, Analiza M Silva, Fátima Baptista, Luís B Sardinha
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2355346399d54c64869828283aec6e22
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spelling	oai:doaj.org-article:2355346399d54c64869828283aec6e222021-11-25T06:00:21ZPrediction equation for lower limbs lean soft tissue in circumpubertal boys using anthropometry and biological maturation.1932-620310.1371/journal.pone.0107219https://doaj.org/article/2355346399d54c64869828283aec6e222014-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0107219https://doaj.org/toc/1932-6203Lean soft tissue (LST), a surrogate of skeletal muscle mass, is largely limited to appendicular body regions. Simple and accurate methods to estimate lower limbs LST are often used in attempts to partition out the influence of body size on performance outputs. The aim of the current study was to develop and cross-validate a new model to predict lower limbs LST in boys aged 10-13 years, using dual-energy X-ray absorptiometry (DXA) as the reference method. Total body and segmental (lower limbs) composition were assessed with a Hologic Explorer-W QDR DXA scanner in a cross-sectional sample of 75 Portuguese boys (144.8±6.4 cm; 40.2±9.0 kg). Skinfolds were measured at the anterior and posterior mid-thigh, and medial calf. Circumferences were measured at the proximal, mid and distal thigh. Leg length was estimated as stature minus sitting height. Current stature expressed as a percentage of attained predicted mature stature (PMS) was used as an estimate of biological maturity status. Backward proportional allometric models were used to identify the model with the best statistical fit: ln (lower limbs LST) = 0.838× ln (body mass) +0.476× ln (leg length) - 0.135× ln (mid-thigh circumference) - 0.053× ln (anterior mid-thigh skinfold) - 0.098× ln (medial calf skinfold) - 2.680+0.010× (percentage of attained PMS) (R = 0.95). The obtained equation was cross-validated using the predicted residuals sum of squares statistics (PRESS) method (R2PRESS = 0.90). Deming repression analysis between predicted and current lower limbs LST showed a standard error of estimation of 0.52 kg (95% limits of agreement: 0.77 to -1.27 kg). The new model accurately predicts lower limbs LST in circumpubertal boys.João Valente-dos-SantosManuel J Coelho-e-SilvaAristides M Machado-RodriguesMarije T Elferink-GemserRobert M MalinaÉdio L PetroskiCláudia S MindericoAnaliza M SilvaFátima BaptistaLuís B SardinhaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 9, p e107219 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q João Valente-dos-Santos Manuel J Coelho-e-Silva Aristides M Machado-Rodrigues Marije T Elferink-Gemser Robert M Malina Édio L Petroski Cláudia S Minderico Analiza M Silva Fátima Baptista Luís B Sardinha Prediction equation for lower limbs lean soft tissue in circumpubertal boys using anthropometry and biological maturation.
description	Lean soft tissue (LST), a surrogate of skeletal muscle mass, is largely limited to appendicular body regions. Simple and accurate methods to estimate lower limbs LST are often used in attempts to partition out the influence of body size on performance outputs. The aim of the current study was to develop and cross-validate a new model to predict lower limbs LST in boys aged 10-13 years, using dual-energy X-ray absorptiometry (DXA) as the reference method. Total body and segmental (lower limbs) composition were assessed with a Hologic Explorer-W QDR DXA scanner in a cross-sectional sample of 75 Portuguese boys (144.8±6.4 cm; 40.2±9.0 kg). Skinfolds were measured at the anterior and posterior mid-thigh, and medial calf. Circumferences were measured at the proximal, mid and distal thigh. Leg length was estimated as stature minus sitting height. Current stature expressed as a percentage of attained predicted mature stature (PMS) was used as an estimate of biological maturity status. Backward proportional allometric models were used to identify the model with the best statistical fit: ln (lower limbs LST) = 0.838× ln (body mass) +0.476× ln (leg length) - 0.135× ln (mid-thigh circumference) - 0.053× ln (anterior mid-thigh skinfold) - 0.098× ln (medial calf skinfold) - 2.680+0.010× (percentage of attained PMS) (R = 0.95). The obtained equation was cross-validated using the predicted residuals sum of squares statistics (PRESS) method (R2PRESS = 0.90). Deming repression analysis between predicted and current lower limbs LST showed a standard error of estimation of 0.52 kg (95% limits of agreement: 0.77 to -1.27 kg). The new model accurately predicts lower limbs LST in circumpubertal boys.
format	article
author	João Valente-dos-Santos Manuel J Coelho-e-Silva Aristides M Machado-Rodrigues Marije T Elferink-Gemser Robert M Malina Édio L Petroski Cláudia S Minderico Analiza M Silva Fátima Baptista Luís B Sardinha
author_facet	João Valente-dos-Santos Manuel J Coelho-e-Silva Aristides M Machado-Rodrigues Marije T Elferink-Gemser Robert M Malina Édio L Petroski Cláudia S Minderico Analiza M Silva Fátima Baptista Luís B Sardinha
author_sort	João Valente-dos-Santos
title	Prediction equation for lower limbs lean soft tissue in circumpubertal boys using anthropometry and biological maturation.
title_short	Prediction equation for lower limbs lean soft tissue in circumpubertal boys using anthropometry and biological maturation.
title_full	Prediction equation for lower limbs lean soft tissue in circumpubertal boys using anthropometry and biological maturation.
title_fullStr	Prediction equation for lower limbs lean soft tissue in circumpubertal boys using anthropometry and biological maturation.
title_full_unstemmed	Prediction equation for lower limbs lean soft tissue in circumpubertal boys using anthropometry and biological maturation.
title_sort	prediction equation for lower limbs lean soft tissue in circumpubertal boys using anthropometry and biological maturation.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/2355346399d54c64869828283aec6e22
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Prediction equation for lower limbs lean soft tissue in circumpubertal boys using anthropometry and biological maturation.

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