537. Five Minutes to Boost Thyroid and Burn Fat

In this episode, I team up with Ulrich Dempfle—the brain behind the Carol bike—to shatter the “cardio queen” myth once and for all. We get into the science of why endless hours on the treadmill aren’t just pointless, they could be sabotaging your thyroid, spiking cortisol, breaking down muscle, and making your body hang on to fat for dear life. Instead, Ulrich and I reveal how short, AI-powered, resistance-based sprints (just two bursts of 20 seconds!) can supercharge your VO2 max, metabolic health, and actually transform your body composition—especially if you’re sick of feeling inflamed or stuck in a fat-loss plateau. You’ll hear my personal shift from marathon cardio to quick, intense workouts and why I feel better than ever at 51. We dig into why this approach is a metabolic and mitochondrial game-changer (especially for my Hashimoto’s warriors!), how it supports muscle, reduces inflammation, and is way easier to recover from.