This tiny wearable can tell you when you need a drink

Researchers at North Carolina State University have developed an ideal wearable to pair with a fitness tracker for those extra sweaty workouts: a tiny Bluetooth-sensor that tracks skin hydration.   

The sensors have much more potential than just reminding runners to drink up after a 5K — according to the research team, the hydration-tracking tech could be a valuable tool for monitoring vulnerable people working in stressful, hot conditions. 

"It’s difficult to measure a person’s hydration quantitatively, which is relevant for everyone from military personnel to athletes to firefighters, who are at risk of health problems related to heat stress when training or in the field,” John Muth, a co-author of a paper describing the work, said in a statement.  Read more...