The End of Cardio? Burn Fat & Boost VO₂ Max in Just 8 Minutes a Week – with REHIT | Ulrich Dempfle : 1275

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Apr 25, 2025

Ulrich Dempfle, a German-trained engineer and co-founder of CAROL Bike, introduces a revolutionary workout method called REHIT. This new approach dismantles outdated cardio advice, promoting short, 8-minute sessions that significantly improve VO₂ max and reduce diabetes risk. Dempfle discusses how REHIT outperforms traditional jogging, offers enormous fitness gains, and even benefits perimenopausal women. He also shares insights on personalizing workouts with AI, emphasizing the importance of fun and adherence for lasting fitness results.

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INSIGHT

REHIT Outperforms Traditional Jogging

REHIT (Reduced Exertion High-Intensity Training) improves fitness six times more than daily jogging with just 15 minutes per week.
A 12% VO2 max increase correlates to a two-year lifespan increase and significantly reduces diabetes risk.

ANECDOTE

Ulrich Dempfle's VO2 Max Journey

Ulrich Dempfle personally increased his VO2 max from 32 to 53 using only 15 minutes of REHIT weekly.
He achieved a 50-60% improvement in cardiovascular fitness over 12 years while balancing family and work.

INSIGHT

Short Sprints Trigger Maximum Adaptations

Maximum training benefits come from very short, intense sprints, saturating the adaptation pathway like flipping a switch.
Two 20-second all-out sprints release powerful signaling molecules triggering strong fitness adaptations.

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