Figure 5.

Impedance values measured across seven hours (n = 8 subjects) and across four days (n = 4 subjects). (a) Average impedance magnitudes were taken across each contact point of the electrode (n = 4) over all muscles. The impedance of ESS electrodes decreased for the first two hours before stabilizing for 2–7 h post-application. Impedance at 53 Hz and 151 Hz averaged across eight subjects demonstrate similar trends. (b) Impedance at 53 Hz and 151 Hz for the four subjects across four days demonstrates inter-subject variability in skin impedance over time. Each line represents an individual subject’s impedance.