Abstract
BackgroundA 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.MethodsTotal 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.ResultsThe 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 (R2 PRESS = 0.838). Correlation between the reference method and the NM was 0.934 (95%CI: 0.880–0.964, Sy∙x = 0.325 L).ConclusionsA 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.Electronic supplementary materialThe online version of this article (doi:10.1186/s12887-016-0730-7) contains supplementary material, which is available to authorized users.
Highlights
A variety of performance outputs are strongly determined by lower limbs volume and composition in children and adolescents
The present study developed and cross-validated an anthropometric equation for estimating thigh volume (TV) based on Dual-energy X-ray absorptiometry (DXA) assessments in female late adolescent athletes
Thigh volume estimated by anthropometry (TV-ANTH) thigh volume estimated by anthropometry, Thigh volume estimated by DXA (TV-DXA) thigh volume estimated by dual X-ray absorptiometry, CI confidence intervals for the mean, SE standard error of the mean, SD standard deviation are presented
Summary
A variety of performance outputs are strongly determined by lower limbs volume and composition in children and adolescents. Total body cannot be considered as a compositional level and the cellular level is of limited and specific interest. Taking these previous notes into account, the organizational system is often reduced into. In the context of many sports, changing total and regional muscle component is a determinant factor in performance [4, 5] and the limited literature [6] suggests that total and appendicular lean soft tissue estimates have probably not received enough attention when compared to fat mass.
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