Comparison of body composition from the Bod Pod S/T with the Bod Pod, hydrostatic weighing, and dual-energy X-ray absorptiometry in young adults

King, J. T. and Hall, J. and Griffith, J. R. and Mullineaux, David and Clasey, J. L. (2009) Comparison of body composition from the Bod Pod S/T with the Bod Pod, hydrostatic weighing, and dual-energy X-ray absorptiometry in young adults. International Journal of Body Composition Research, 7 (2). pp. 41-48. ISSN 1479-456X

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Comparison of body composition from the Bod Pod S/T with the Bod Pod, hydrostatic weighing, and dual-energy X-ray absorptiometry in young adults.
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Abstract

Objective: Measurements of body volume (Vb), body density (Db), predicted thoracic gas volume (Vtgpred),and percent fat (%Fat) using the self-testing air displacement plethysmography unit (Bod Pod S/T) were compared to measurements determined using the original air displacement plethysmography unit (Bod Pod). In addition, %Fat measurements from the Bod Pod S/T were compared to %Fat measures from hydrostatic weighing (HW) and total body dual energy X-ray absorptiometry scans (DXA).
Methods: Standing height, followed by Bod Pod S/T, Bod Pod, HW with measured residual lung volume, and DXA scans were completed by 42 young adults. Measurements of Vb, Db, Vtgpred, thoracic gas volume (Vtgmeas) and %Fat were subsequently determined and compared.
Results: Significant mean differences (mean ± SE) of Vb = 0.159 ± 0.045 litres (l), Db = -0.0049 ± 0.0008
g/cc, Vtg = -0.235 ± 0.096 l and 2.2 ± 0.3 %Fat were found between the Bod Pod S/T and the Bod Pod (P<0.05). Significant mean differences in %Fat measures were found between the Bod Pod S/T and HW (1.8 ± 1.5%), but there were no significant differences between Bod Pod S/T and DXA (0.6 ± 1.5%). Significantly strong correlation coefficients were found for all body composition measures between the
Bod Pod S/T and Bod Pod, HW and DXA.
Conclusions: The Bod Pod S/T produced small systematic differences of little physiological and methodological
consequences, resulting in only a minor impact to the resulting body composition measurements. Hence, the Bod Pod S/T is a viable alternative to traditional body composition measuring techniques.

Item Type:Article
Additional Information:Objective: Measurements of body volume (Vb), body density (Db), predicted thoracic gas volume (Vtgpred),and percent fat (%Fat) using the self-testing air displacement plethysmography unit (Bod Pod S/T) were compared to measurements determined using the original air displacement plethysmography unit (Bod Pod). In addition, %Fat measurements from the Bod Pod S/T were compared to %Fat measures from hydrostatic weighing (HW) and total body dual energy X-ray absorptiometry scans (DXA). Methods: Standing height, followed by Bod Pod S/T, Bod Pod, HW with measured residual lung volume, and DXA scans were completed by 42 young adults. Measurements of Vb, Db, Vtgpred, thoracic gas volume (Vtgmeas) and %Fat were subsequently determined and compared. Results: Significant mean differences (mean ± SE) of Vb = 0.159 ± 0.045 litres (l), Db = -0.0049 ± 0.0008 g/cc, Vtg = -0.235 ± 0.096 l and 2.2 ± 0.3 %Fat were found between the Bod Pod S/T and the Bod Pod (P<0.05). Significant mean differences in %Fat measures were found between the Bod Pod S/T and HW (1.8 ± 1.5%), but there were no significant differences between Bod Pod S/T and DXA (0.6 ± 1.5%). Significantly strong correlation coefficients were found for all body composition measures between the Bod Pod S/T and Bod Pod, HW and DXA. Conclusions: The Bod Pod S/T produced small systematic differences of little physiological and methodological consequences, resulting in only a minor impact to the resulting body composition measurements. Hence, the Bod Pod S/T is a viable alternative to traditional body composition measuring techniques.
Keywords:air displacement plethysmography, Bod Pod S/T, Bod Pod, hydrostatic weighing, DXA, body volume, body density, percent fat, bmjtoc
Subjects:C Biological Sciences > C600 Sports Science
B Subjects allied to Medicine > B120 Physiology
Divisions:College of Social Science > School of Sport and Exercise Science
ID Code:4217
Deposited By: Alison Wilson
Deposited On:17 Mar 2011 11:40
Last Modified:05 Dec 2013 10:23

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