Wearables are coming in an increasing array of shapes, form factors and guises these days as health and fitness tracking proliferates. Here at 4YFN at the MWC tradeshow we spotted a new one: A stick-on patch for tracking athletes’ sweat to monitor salt loss and help them tailor their rehydration strategy. The Spanish startup behind … Continue reading Sweanty’s wearable patch for athletes tracks salt loss to help them hydrate