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Nutrients 2014, 6(5), 1886-1898; doi:10.3390/nu6051886
Article

Influence of Posture and Frequency Modes in Total Body Water Estimation Using Bioelectrical Impedance Spectroscopy in Boys and Adult Males

1,2,3,4,* , 4
 and 5
Received: 21 February 2014; in revised form: 16 April 2014 / Accepted: 26 April 2014 / Published: 5 May 2014
(This article belongs to the Special Issue Paediatric Nutrition)
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Abstract: The aim of the study was to examine differences in total body water (TBW) measured using single-frequency (SF) and multi-frequency (MF) modes of bioelectrical impedance spectroscopy (BIS) in children and adults measured in different postures using the deuterium (2H) dilution technique as the reference. Twenty-three boys and 26 adult males underwent assessment of TBW using the dilution technique and BIS measured in supine and standing positions using two frequencies of the SF mode (50 kHz and 100 kHz) and the MF mode. While TBW estimated from the MF mode was comparable, extra-cellular fluid (ECF) and intra-cellular fluid (ICF) values differed significantly (p < 0.01) between the different postures in both groups. In addition, while estimated TBW in adult males using the MF mode was significantly (p < 0.01) greater than the result from the dilution technique, TBW estimated using the SF mode and prediction equation was significantly (p < 0.01) lower in boys. Measurement posture may not affect estimation of TBW in boys and adult males, however, body fluid shifts may still occur. In addition, technical factors, including selection of prediction equation, may be important when TBW is estimated from measured impedance.
Keywords: body fluid; deuterium; dilution technique; impedance technique; prediction equation; accuracy; technical error body fluid; deuterium; dilution technique; impedance technique; prediction equation; accuracy; technical error
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Kagawa, M.; Wishart, C.; Hills, A.P. Influence of Posture and Frequency Modes in Total Body Water Estimation Using Bioelectrical Impedance Spectroscopy in Boys and Adult Males. Nutrients 2014, 6, 1886-1898.

AMA Style

Kagawa M, Wishart C, Hills AP. Influence of Posture and Frequency Modes in Total Body Water Estimation Using Bioelectrical Impedance Spectroscopy in Boys and Adult Males. Nutrients. 2014; 6(5):1886-1898.

Chicago/Turabian Style

Kagawa, Masaharu; Wishart, Connie; Hills, Andrew P. 2014. "Influence of Posture and Frequency Modes in Total Body Water Estimation Using Bioelectrical Impedance Spectroscopy in Boys and Adult Males." Nutrients 6, no. 5: 1886-1898.



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