The Shortest and Most Effective Cardio: A Conversation with Carol Bike CEO Ulrich Dempfle

In this episode of the Discover Strength Podcast, Luke Carlson sits down with Ulrich Dempfle, CEO and co-founder of Carol Bike, to discuss how Reduced Exertion High-Intensity Interval Training (REHIT) is transforming the world of cardio. Built on cutting-edge scientific research, REHIT protocols deliver remarkable improvements in VO2 max and metabolic health with workouts as short as 5 minutes.

Ulrich explains how Carol Bike was designed from the ground up using lab-validated protocols and integrated AI to create an efficient, automated workout that eliminates excuses like lack of time and complexity. They explore the science behind the two 20-second sprint model, how it compares to traditional cardio and HIIT, and why shorter, more intense efforts may be more effective for both longevity and adherence.

Learn more about CAROL and the most efficient workout.

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