CAROL Bike sponsored this podcast. IN THIS EPISODE OF THE HUMAN UPGRADE™ … you’ll learn about new research that’s pinpointing the most effective cardio workouts. You’ll find out that you can do a cardio workout in just 15 minutes a week and still increase your cardiovascular fitness. You’ll also get an introduction to the new CAROL Bike 2.0 and its upgraded great features.Ulrich Dempfle, MBA, Chief Product Officer, CEO and co-founder of CAROL Bike, returns to the podcast with exciting new research results. CAROL’s REHIT (Reduced Exertion HIIT) workout retained all its effectiveness yet cut its time nearly in half—from 8 minutes and 40 seconds to five minutes.CAROL Bike continues to innovate fitness and prove that more or longer sprints aren’t better. “What matters is that you sprint at your personalized maximum intensity, switching from zero to max in a fraction of a second,” Ulrich explains.  An investment of only 5 minutes, 3 times a week means you can reap powerful cardiovascular benefits, even gain strength, and get on with your other biohacks.SPECIAL OFFER FOR THE HUMAN UPGRADE LISTENERS: Go to https://www.carolbike.com. Use code HumanUpgrade to get 2 years of free membership (a total savings of $360). CAROL Bike also offers a 100-day home trial of the CAROL Bike 2.0.WE APPRECIATE OUR PARTNERS. CHECK THEM OUT!Harness Cold to Improve Health & Performance: https://www.cryobuilt.comSleep Better on Natural Memory Foam: https://myessentia.com, use code DAVEVIP to get an exclusive discount. Learn more on The Human Upgrade podcast: Mattress Smarts 101 for High-Performance Sleep – Jack Dell’Accio – #875Customized Nootropics for Your Own Neurochemistry: https://nootopia.com/dave, use code DAVE10 to get 10% off. Learn more on The Human Upgrade podcast: Hack Your Neurochemistry with Customized Nootropics – Mr. Noots & Matt Gallant – #861See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.