In this episode, I sit down with Stefan van der Fluit, one of the founders and CEO of FLOWBIO, to dive into how real-time sweat data is changing the way athletes think about hydration, fueling, and performance. We talk about where the idea for FLOWBIO came from, the science behind sweat analysis, and why guessing hydration needs is no longer good enough for athletes.

Stefan breaks down what your sweat is actually telling you, how sodium loss impacts performance more than most people realize, and why personalized hydration strategies matter far more than generic recommendations. We also explore how FLOWBIO’s sweat sensor works in real-world training and racing, and how athletes can use the data to train smarter, recover better, and avoid costly mistakes on race day.

If you’re an endurance athlete, coach, or anyone curious about using  ...