Fitness watches should stop treating hydration and sweat loss as an afterthought

The incident last week where a seemingly healthy person got heat exhaustion and passed away from a California half marathon is a stark reminder that smartwatches have a key health area that they could be focusing more on: sweat loss.

source https://www.androidcentral.com/wearables/hydration-and-sweat-loss-arent-the-afterthought-fitness-watches-treat-them-as