Fig. 4: On-body real-time health monitoring and wireless data transmission.
From: Garment embedded sweat-activated batteries in wearable electronics for continuous sweat monitoring

a Optical images of the jogging subject wearing SMS embedded in the elbow pad and the phone interface that illustrates wireless communication and data acquisition. b The real-time monitoring results of the sweat Na+ concentration, pH value and skin impedance during jogging. c–e The comparison of data changes of Na+ concentration, pH value, and skin impedance during exercise on heads of three different subjects. f–h The comparison of data changes of Na+ concentration, pH value, and skin impedance during exercise for three different body locations, including head, elbow, and knee.