How Smartwatches Are Measuring Hydration Levels

In this episode of The Wearable Tech Podcast, Lucas and Luna explore a new frontier in wearable health monitoring: real-time hydration tracking. They dig into the science behind bioimpedance sensors and optical spectroscopy, explaining how companies like Garmin and a startup called Nix are bringing lab-grade hydration data to your wrist. Lucas breaks down the key metric — sweat chloride concentration — and why it matters for athletes, people with kidney conditions, and anyone who wants to know when they're truly dehydrated. They discuss a recent study from the Journal of Applied Physiology showing that optical hydration sensors can detect fluid loss within 2% accuracy. Luna pushes back on whether wrist sensors can match the precision of urine specific gravity tests, and Lucas walks through the trade-offs. The conversation also touches on how this technology could eventually replace cumbersome urine test strips for millions of people. If you've ever wondered whether your smartwatch can tell you when to drink water, this episode has the answer. #HydrationTracking #Smartwatch #Bioimpedance #WearableTech #Garmin #Nix #SweatSensor #HealthTech #FitnessTech #Dehydration #ContinuousMonitoring #OpticalSensor #AthleteHealth #KidneyHealth #TechPodcast #Technology #FexingoBusiness #BusinessPodcast Keep every episode free: buymeacoffee.com/fexingo