Estimating fat-free mass in elite youth male soccer players: cross-validation of different field methods and development of prediction equation
- 11 December 2018
- journal article
- research article
- Published by Taylor & Francis Ltd in Journal of Sports Sciences
- Vol. 37 (11), 1197-1204
- https://doi.org/10.1080/02640414.2018.1551045
Abstract
This study determined the most effective field method for quantifying fat-free mass (FFM) in elite youth male soccer players compared to dual X-ray absorptiometry (DXA) values and to develop prediction equations for FFM based on anthropometric variables. Forty-one male elite-standard youth soccer players, ages 16.2–18.0 years, undertook FFM assessments including bioelectrical impedance analysis, and different skinfold-based prediction equations. DXA provided a criterion measure of FFM. Correlation coefficients, bias, limits of agreement, and differences were used as validity measures, and regression analyses to develop soccer-specific prediction equations. Slaughter et al (1988), Durnin and Wormersley (1974), and Sarria et al (1998) equations showed the lowest biases, and no significant, standardized, and substantial differences against DXA. The new youth soccer-specific anthropometric equation explained 91% of the DXA-derived FFM variance using three circumferences, eight skinfolds, and one bone breadth. All field methods compared in this study may not be adequate for estimating FFM in elite youth male soccer players, except the equations of Slaughter et al (1988), Durnin and Wormersley (1974), and Sarria et al (1998). We recommend the use of the new soccer-specific equation proposed in this study as a valid alternative to DXA to quantify FFM among elite youth male players.Keywords
Funding Information
- Qatar National Research Fund (QA) (a member of Qatar Foundation).
This publication has 40 references indexed in Scilit:
- A PRISMA-Driven Systematic Review of Predictive Equations for Assessing Fat and Fat-Free Mass in Healthy Children and Adolescents Using Multicomponent Molecular Models as the Reference MethodJournal of Obesity, 2013
- Changes in Body Composition, Hormonal Status, and Physical Fitness in 11-, 13-, and 15-Year-Old Finnish Regional Youth Soccer Players During a Two-Year Follow-UpJournal of Strength and Conditioning Research, 2011
- Anthropometric and Physiological Characteristics of Young Soccer Players According to Their Playing Positions: Relevance for Competition SuccessJournal of Strength & Conditioning Research, 2011
- Variation in Body Composition in Professional Soccer Players: Interseasonal and Intraseasonal Changes and the Effects of Exposure Time and Player PositionJournal of Strength and Conditioning Research, 2010
- Pediatric reference data for lean tissue properties: density and hydration from age 5 to 20 yThe American Journal of Clinical Nutrition, 2010
- How Well do Skinfold Equations Predict Percent Body Fat in Elite Soccer Players?International Journal of Sports Medicine, 2009
- Validation of a skinfold based index for tracking proportional changes in lean massBritish Journal of Sports Medicine, 2006
- Prediction of fat and fat-free mass in male athletes using dual X-ray absorptiometry as the reference methodJournal of Sports Sciences, 2000
- STATISTICAL METHODS FOR ASSESSING AGREEMENT BETWEEN TWO METHODS OF CLINICAL MEASUREMENTThe Lancet, 1986
- Body fat assessed from total body density and its estimation from skinfold thickness: measurements on 481 men and women aged from 16 to 72 YearsBritish Journal of Nutrition, 1974