[Assessment of body composition by bioelectrical impedance analysis: effects of skin resistance on impedance].
Effects of skin resistance on impedance values were studied in order to propose reliable determination of body composition in human. Analysis of the data indicated that impedance values (Z = (R2 + Xc2)0.5) varied considerably in the following conditions: 1) 230 +/- 97.8 ohms when electrodes were directly attached; 2) 490 +/- 52.5 ohms when electrodes were attached immediately after use of alcohol; 3) 584 +/- 44.1 ohms when electrodes were attached immediately after use of alcohol with electrode gel; and 4) 589 +/- 45.0 ohms when electrodes were attached in the order of elimination of skin resistance----use of alcohol----use of electrode gel. We suggest that impedance obtained by the bioelectrical impedance analysis should be measured immediately after elimination of skin resistance at least with electrode gel.
Division of Exercise Physiology, Osaka Prefectural College of Nursing, Japan.
F
F
Nakadomo
K
K
Tanaka
T
T
Hazama
K
K
Maeda
D000293:Adolescent; D001823:Body Composition; D004553:Electric Conductivity; D005260:Female; D006801:Humans; D012879:Skin Physiological Phenomena