Agreement and validity of existing anthropometric calibration models to estimate whole body density in male professional football players

Introduction\ud To date no calibration models exist to estimate whole body density (Db) of professional footballers, as such the development of\ud practical anthropometric calibration models to make sound body composition judgements is imperative. The aim of this study was\ud to investigate the agreement and validity of estimating Db from 15 existing calibration models through comparison to a criterion\ud method of hydrostatic weighing (HW) in male professional footballers.\ud Materials and Methods\ud Data were gathered from a total of n=206 professional football participants (x±s; age=24.1±5.4-years, body mass=78.8±8.4 kg,\ud stature=180.1±7.0 cm, Db 1.075±0.01 g.ml-1). Bland and Altman limits of agreement (LoA) approaches were used to determine\ud bias and random variation derived from the calibration models.\ud Results\ud Bias and random errors for the published calibration models ranged from -0.005 to +0.015 g.ml-1 and 1.012 to 1.090 g.ml-1 respectively. A priori criterion (±3.8% p=