ESTIMATION OF HUMAN BODY COMPOSITION BY BIOELECTRICAL IMPEDANCE MEASUREMENTS : EQUATION FOR ESTIMATING TOTAL BODY WATER IN JAPANESE SUBJECTS
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概要
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A new method for estimation of total body water in human subjects by measurement of bioelectrical impedance is described. Determinations of impedance (Z) were made in 24 healthy women aged 35.9±15.39yr using an electrical impedance analyzer (T-1988K, Toyo Physical Inc.) with a four-electrode arrangement that delivers a painless signal (500μA at 50kHz) into the body. The mean coefficient of variation for ten impedance measurements in 4 male subsamples was 0.8% (range, 0.2〜1.2%). Total body water determined by deuterium-dilution was 26.1±2.44l. The estimation equation was developed by regression analysis of data from 24 women. Height^2/resistive impedance was the most significant variable for prediction of deuterium-dilution space (TBW) and yielded r=0.804 (p <0.001) with a SE of estimate=1.41l. The regression equation generated was Total Body Water=0.5294 (Ht^2/Z)+2.5139. These data indicate that bioelectrical impedance measurement is a reliable and valid approach for the estimation of total body water in human subjects. This noninvasive method, wich is safe, simple, rapid and convenient, should prove useful in a clinical setting, and also for epidemiological and exercise physiology studies.
- 日本体力医学会の論文
- 1990-02-01
著者
関連論文
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- ESTIMATION OF HUMAN BODY COMPOSITION BY BIOELECTRICAL IMPEDANCE MEASUREMENTS : EQUATION FOR ESTIMATING TOTAL BODY WATER IN JAPANESE SUBJECTS