title: Concurrent agreement between an anthropometric model to predict thigh volume and dual-energy X-Ray absorptiometry assessment in female volleyball players aged 14-18 years.
abstract: A variety of performance outputs are strongly determined by lower limbs volume and composition in children and adolescents. The current study aimed to examine the validity of thigh volume (TV) estimated by anthropometry in late adolescent female volleyball players. Dual-energy X-ray absorptiometry (DXA) measures were used as the reference method.
  
  
  
  Total and regional body composition was assessed with a Lunar DPX NT/Pro/MD+/Duo/Bravo scanner in a cross-sectional sample of 42 Portuguese female volleyball players aged 14-18 years (165.2 ± 0.9 cm; 61.1 ± 1.4 kg). TV was estimated with the reference method (TV-DXA) and with the anthropometric method (TV-ANTH). Agreement between procedures was assessed with Deming regression. The analysis also considered a calibration of the anthropometric approach.
  
  
  
  The equation that best predicted TV-DXA was: -0.899 + 0.876 × log10(body mass) + 0.113 × log10(TV-ANTH). This new model (NM) was validated using the predicted residual sum of squares (PRESS) method (R2PRESS= 0.838). Correlation between the reference method and the NM was 0.934 (95%CI: 0.880-0.964, Sy∙x= 0.325 L).
  
  
  
  A new and accurate anthropometric method to estimate TV in adolescent female volleyball players was obtained from the equation of Jones and Pearson alongside with adjustments for body mass.
authors.affiliation: UID/DTP/03213/2016, Faculty of Sport Sciences and Physical Education, University of Coimbra, Pavilhao III, 3040-156, Coimbra, Portugal.|Department of Medical Imaging and Radiation Therapy, School of Health and Technology, Instituto Politécnico de Coimbra, Coimbra, Portugal.
authors.forename: Óscar M
authors.initials: ÓM
authors.lastname: Tavares
authors.affiliation: UID/DTP/03213/2016, Faculty of Sport Sciences and Physical Education, University of Coimbra, Pavilhao III, 3040-156, Coimbra, Portugal.|Faculty of Physical Education and Sport, Lusófona University of Humanities and Technologies, Lisbon, Portugal.|Portuguese Foundation for Science and Technology (SFRH/BPD/100470/2014), Lisbon, Portugal.
authors.forename: João
authors.identifier: 0000-0003-0980-0269
authors.initials: J
authors.lastname: Valente-Dos-Santos
authors.affiliation: UID/DTP/03213/2016, Faculty of Sport Sciences and Physical Education, University of Coimbra, Pavilhao III, 3040-156, Coimbra, Portugal.
authors.forename: João P
authors.initials: JP
authors.lastname: Duarte
authors.affiliation: Research Centre in Sport and Physical Activity, Maia Institute of Higher Education, Maia, Portugal.
authors.forename: Susana C
authors.initials: SC
authors.lastname: Póvoas
authors.affiliation: Laboratory of Investigation in Exercise (LIVE), Department of Physical Education, São Paulo State University (UNESP), São Paulo, Presidente Prudente, Brazil.
authors.forename: Luís A
authors.initials: LA
authors.lastname: Gobbo
authors.affiliation: Laboratory of Investigation in Exercise (LIVE), Department of Physical Education, São Paulo State University (UNESP), São Paulo, Presidente Prudente, Brazil.
authors.forename: Rômulo A
authors.initials: RA
authors.lastname: Fernandes
authors.affiliation: Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal.
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Marinho
authors.affiliation: Faculty of Medicine, University of Coimbra, Coimbra, Portugal.
authors.forename: José M
authors.initials: JM
authors.lastname: Casanova
authors.affiliation: School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK.
authors.forename: Lauren B
authors.initials: LB
authors.lastname: Sherar
authors.affiliation: Laboratory of Metabolic Adaptations to Exercise in Physiological and Pathological Conditions, Clermont Auvergne University, Blaise Pascal University, Clermont-Ferrand, France.|School of Exercise Science, Faculty of Health, Australian Catholic University, Melbourne, VIC, Australia.|Research Centre in Human Nutrition, Auvergne, Clermont-Ferrand, France.
authors.forename: Daniel
authors.initials: D
authors.lastname: Courteix
authors.affiliation: UID/DTP/03213/2016, Faculty of Sport Sciences and Physical Education, University of Coimbra, Pavilhao III, 3040-156, Coimbra, Portugal. mjcesilva@hotmail.com.
authors.forename: Manuel J
authors.initials: MJ
authors.lastname: Coelho-E-Silva
mesh_terms: D015502:Absorptiometry, Photon; D000293:Adolescent; D000886:Anthropometry / Q000379:methods*; D001823:Body Composition; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008962:Models, Theoretical; D011174:Portugal; D013848:Thigh / Q000033:anatomy & histology*; D054798:Volleyball
keywords: Adolescent female athletes; Body composition; Deming regression; PRESS