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Int J Sports Med 2019; 40(10): 619-624
DOI: 10.1055/a-0969-8591
Training & Testing
© Georg Thieme Verlag KG Stuttgart · New York

Field Methods to Estimate Fat-free Mass in International Soccer Players

F. Javier Nuñez
1   University of Pablo de Olavide, Physical Performance & Sports Research, Seville, Spain
,
Diego Munguia-Izquierdo
1   University of Pablo de Olavide, Physical Performance & Sports Research, Seville, Spain
,
Cristian Petri
2   Experimental and Clinic Medicine, University of Florence, Florence, Italy
,
Luis Suarez-Arrones
1   University of Pablo de Olavide, Physical Performance & Sports Research, Seville, Spain
› Author Affiliations
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Publication History



accepted 19 June 2019

Publication Date:
31 July 2019 (online)

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Abstract

Based on the high financial and logistical costs associated with the assessment of body composition with dual-energy X-ray absorptiometry (DXA), this study determined which field method has the best correlation with DXA data, and developed an equation to estimate fat-free mass (FFM) using the field anthropometric data in international soccer players. A total of 17 international soccer players participated in this study. DXA values provided a criterion measure of FFM. Correlation coefficients, biases, limits of agreement, and differences were used as validity measures, and regression analyses were used to develop the prediction equation. All field methods used to obtain FFM data showed positive correlations (r from 0.90–0.96) with DXA. Only the equation developed by Deurenberg et al. [6] showed no differences from DXA with a low bias. The main strength of this study was providing a valid and accurate equation to estimate FFM specifically in international soccer players.

Key words

body composition. DXA - team game - indirect methods
 

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