著者

村田 邦夫 三村 寛一 近森 卓 三村 達也 前田 如矢

出版者

日本体力医学会

雑誌

体力科學 (ISSN:0039906X)

巻号頁・発行日

vol.45, no.6, 1996-12-01

著者

田中 喜代次 松浦 義行 中村 栄太郎 中塘 二三生 喜多尾 浩代 竹島 伸生 三村 寛一 前田 如矢

出版者

日本生理人類学会

雑誌

The Annals of physiological anthropology (ISSN:02878429)

巻号頁・発行日

vol.9, no.1, pp.59-65, 1990-01-01

被引用文献数

1

著者

中塘 二三生 田中 喜代次 羽間 鋭男 前田 如矢

出版者

日本体力医学会

雑誌

体力科學 (ISSN:0039906X)

巻号頁・発行日

vol.39, no.3, pp.164-172, 1990-06-01

被引用文献数

11 7

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Recently, bioelectrical impedance analysis systems(BIA)have become available for determination of human body composition, The validity of BIA has been found to be sufficiently in the American population. However, more work is needed to assess the validity and applicability of BIA to the Japanese population. The purposes of this study were (1) to test the validity of body composition measured by BIA in comparison with the underwater weighing criterion method, and (2) to develop a convenient equation that would reliably predict body composition using BIA and anthropometric measurements in Japanese females. The subjects were 226 Japanese womn and girls aged 11 to 55 years (23.9±8.3). Body impedance was measured using a tetrapolar electrode method, with a localized 800-μA and 50-kHz current injection(Selco SIF-881. The percentage of body fat (%fat) estunated by BIA was significantly correlated with densitometrically determined %fat (r=0.793, Lukaski et al.method;and r=0.800, Segal et al.method). The magnitude of these correlations was substantially higher when compared with r=0.615 found between the skinfold thickness method and the criterion method. Absolute %fat values estimated by BIA were, however, significantly lower than those determined by the criterion method, thereby indicating the need for a more accurate method of assessing Japanese body composition. For this, we propose the use of D=1.1303-0.0726(Wt/2), where D=body density in g/ml, Wt=body weight in kg, R=(R^2+Xc^2)<0.5> in ohms, and Ht=body height in cm. Lean body mass (LBM) and %fat predicted from this equation were correlated significantly (r=0.924 and r=0.799, respedtively) with values determined by densitometry. The standard error of estimates of LBM and %fat resulted in figures of 1.9kg and 3.7%, respectively. Thus we suggest that BIA is valid, convenient, and inexpensive, and that the prediction equation proposed in this study is useful for assessment of body composition in Japanese adult females.

著者

渡辺 完児 中塘 二三生 田中 喜代次 三宅 眞理 前田 如矢

出版者

日本体力医学会

雑誌

体力科學 (ISSN:0039906X)

巻号頁・発行日

vol.43, no.6, 1994-12-01

著者

中塘 二三生 田中 喜代次 渡辺 完児 三宅 眞理 前田 如矢

出版者

日本体力医学会

雑誌

体力科學 (ISSN:0039906X)

巻号頁・発行日

vol.41, no.4, pp.467-476, 1992-08-01

被引用文献数

9

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Several predichon equations for estimating body composition of Japanese men and women have recently been developed using a linear regression model with a combinahon of impedance and anthropometric measurements as independent variables. The purpose of this study was to determine the cross-validity of body density (Db) estimated from bioelectrical impedance (BI) and skinfold thickness (ST) methods in comparison with underwater weighing (UW) as a criterion reference method. Percentage body fat (%BF) was derived from Db according to the equation Brozek et al. Fifty-seven healthy Japanese women, aged 19 to 57 years, volunteered to prticipate in the study. Impedance was measured by use of a portablef four-terminal impedance plethysmograph (Selco, SIF-891). %BF derived from the BI method (r=0.860〜0.875) was correlated with hydrodensitometrically determined %BF to a greater extent than %BF obtained using the ST method (r=0.733〜0.758) or ultrasound method (r=0.536〜0.721). Correlations of various anthropometric indices (r=0.655〜0.691) with hydrodensitometrically deterinined %BF were even lower. It was noteworthy, however, that mean %BF derived from existing BI equations differed significantly from hydrodensitometrically determined mean %BF. Therefore, we attempted to develop a new equation that was applicable to Japanese adult women as follows : Db=1.1613-0.1038 (Wt・Z)/Ht^2, where Wt=weight in kg, Z=impedance in ohms, and Ht=height in cm. The prediction accuracy of this eqation was r=0.866 or SEE=0.0077g/ml. Cross-validation of this equation on a different sample (122 Japanese women, aged 18 to 59 years) revealed a correlation of r=0.869 in terms of %BF, SEE=3.2%, and no significant difference between estimated %BF and the criterion. We sugget that the BI method is one of the most convenient, valid means of assessing human body composition,and that the newly developed BI equation could be useful particularly when the subjects are Japanese adult women in their late teens to fifties.