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(Experiment I—Pencil lead solid-type (PLS) electrode compared with Ag/AgCl electrode) Example of electrocardiogram (ECG) signals for each experimental condition: (a) dry condition; freshwater immersed condition (b) without movement; and (c) with movement; and (d) freshwater wet condition. ECG signals acquired with Ag/AgCl (blue line) and PLS electrodes (red line).
