Disclosure: The authors declare no conflict of interest. Diana M. Thomas is a consultant for Jenny Craig.
Relationships between body roundness with body fat and visceral adipose tissue emerging from a new geometrical model
Article first published online: 11 JUN 2013
Copyright © 2013 The Obesity Society
Volume 21, Issue 11, pages 2264–2271, November 2013
How to Cite
Thomas, D. M., Bredlau, C., Bosy-Westphal, A., Mueller, M., Shen, W., Gallagher, D., Maeda, Y., McDougall, A., Peterson, C. M., Ravussin, E. and Heymsfield, S. B. (2013), Relationships between body roundness with body fat and visceral adipose tissue emerging from a new geometrical model. Obesity, 21: 2264–2271. doi: 10.1002/oby.20408
- Issue published online: 1 NOV 2013
- Article first published online: 11 JUN 2013
- Accepted manuscript online: 21 MAR 2013 05:14AM EST
- Manuscript Accepted: 21 JAN 2013
- Manuscript Received: 5 NOV 2012
To develop a new geometrical index that combines height, waist circumference (WC), and hip circumference (HC) and relate this index to total and visceral body fat.
Design and Methods
Subject data were pooled from three databases that contained demographic, anthropometric, dual energy X-ray absorptiometry (DXA) measured fat mass, and magnetic resonance imaging measured visceral adipose tissue (VAT) volume. Two elliptical models of the human body were developed. Body roundness was calculated from the model using a well-established constant arising from the theory. Regression models based on eccentricity and other variables were used to predict %body fat and %VAT.
A body roundness index (BRI) was derived to quantify the individual body shape in a height-independent manner. Body roundness slightly improved predictions of %body fat and %VAT compared to the traditional metrics of body mass index (BMI), WC, or HC. On this basis, healthy body roundness ranges were established. An automated graphical program simulating study results was placed at http://www.pbrc.edu/bodyroundness.
BRI, a new shape measure, is a predictor of %body fat and %VAT and can be applied as a visual tool for health status evaluations.