Bulletproof Radio

You’ve probably heard of HIIT—but have you heard of “REHIT?”  This isn’t just another workout trend...it’s a new science-backed way to train with maximum efficiency and zero wasted time. If you’re still jogging, you’re wasting hours for minimal results. In this episode of The Human Upgrade, Dave Asprey sits down with Ulrich Dempfle, German-trained engineer and co-founder of CAROL Bike, to dismantle outdated cardio advice and introduce the 5-minute protocol that’s obliterating fitness myths. Forget the treadmill grind. REHIT (Reduced Exertion High-Intensity Training) exercising delivers: • 12% VO₂ max increase• 6x the fitness gains of daily jogging • 62% drop in diabetes risk • 5x more BDNF for brain power —all with just 8 minutes of effort per week. But was it? Ulrich unpacks the hard data, crushes the Zone 2 obsession, and shows how a brand-new way of exercising is giving explosive results—no matter your age or fitness level. What You’ll Learn in This Episode:&nbs