Apparently researchers at the University of Toronto Scarborough have created a tiny sensor positioned inside a temporary tattoo. This sensor can detect the components in your sweat and other metabolic changes. Sports coaches are interested in using the sensors to “fine tune athletes’ training.”
Read the full story here…http://www.dailymail.co.uk/sciencetech/article-2244578/The-smart-tattoo-measure-tired-Smiley-face-transfer-like-children-wear-hides-medical-sensors.html?ito=feeds-newsxml