Body composition and childhood obesity.

Underwater weighing has been the gold standard for the measurement of body composition in humans; however, the two formulas widely used, the Siri and Bronze, were developed using young adult white males. The development of newer techniques in the past 20 years has greatly expanded the accuracy and ease of measuring body composition. These methods have improved the ability to model relationships between body compartments. This article reviews the compartmental models and then critiques the methods available to measure body composition.