Fig. 5: Analysis of sodium and potassium ions in sweat from different parts of the body.
From: Large-scale fully printed “Lego Bricks” type wearable sweat sensor for physical activity monitoring
a Schematic of the vertically assembled “Lego Bricks” wearable sweat ion sensor. b Optical photographs of “Lego Bricks” wearable ion sensor worn on the forearm and back of the subject. Consent was obtained for publication of the photograohs. c The same wearable sweat ion sensor enables real-time on-body monitoring and ex-situ collection measurement of sweat. d Scatter fit plots of on-body and ex-situ Na+ and K+ detection. e The exercise process is divided into three phases: high intensity, low intensity, and rest. f Temporal changes in sweat Na+ and K+ concentration in the forearm during exercise, and (g) sweat Na+ and K+ concentration in the back during exercise. Analysis of (h) Na+ and (i) K+ concentrations in the back and forearm at different time of exercise (n = 3). The error bars represent the standard deviations of the measured data.
