Comparison of air displacement plethysmography to hydrostatic weighing for estimating total body density in children.

Background: The purpose of this study was to examine the accuracy of total body density and percent body fat (% fat) using air displacement plethysmography (ADP) and hydrostatic weighing (HW) in children.

Methods: Sixty-six male and female subjects (40 males: 12.4 +/- 1.