Variation of foot-to-foot resistance measured by body fat analysers with electrode geometry and contact area

摘要

This work showed that the resistance measurement can be influenced by characteristics of the measuring circuit and by the size of current electrodes, while the size of voltage electrodes has less effect. An increase in frequency from 40 to 50 kHz reducing the resistance by about 10 fl is also observed. The relative position of feet with metal electrodes has a major effect on the reproducibility of resistance measurement; when feet were moved backward by 5 cm, the foot-to-foot resistance increased by 20-30 Ω, due to a rise in length of current path under the feet.