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5 Minutes to Longevity & Younger Brain (Science of REHIT) with Ulrich Dempfle

Ulrich Dempfle, CEO and co-founder of CAROL, built on his background in mechanical engineering to develop the world’s only Reduced Exertion HIIT (REHIT) bike, alongside leading exercise researchers.  

Ulrich heads up all aspects of product development at CAROLfrom data science to software and hardware. Making him the perfect person to talk you through the science and technology behind CAROL’s signature workout.


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What if you could get twice the health and brain benefits of traditional cardio in just five minutes?

I know, it sounds impossible. Most people think they need to spend 45 minutes on a treadmill to see real results, but the science shows otherwise.

In today’s episode, I’m diving into one of the smartest, most time-efficient workouts I’ve ever come across. It’s called REHIT and studies show it can improve your VO2 max, boost your mood, supercharge learning and even cut your risk of metabolic disease by over 60%.

I’ll share how this simple shift in training can literally rewire your brain for focus, memory, and performance, while giving you back hours of your life each week.

Joining me is Ulrich Dempfle, CEO and Co-Founder of Carol Bike, who helped take this groundbreaking science out of the lab and into a form anyone can use at home.

If you’ve ever said, “I don’t have time to exercise,” this conversation is going to change the way you think about fitness, brain health, and what’s possible in just two 20-second sprints.

/ / / Are you ready to take the next step on your brain optimization journey? / / /

Choose your own adventure. Below are the best places to start:

>>> CAROL Bike

>>> Kwik Mind Supplement

>>> Join Limitless Live 2025 in San Diego 8-10 December

>>> Discover Your Unique KWIK BRAIN C.O.D.E To Activate Your Genius

Take your first step by choosing one of the options above, and you will find everything you need to ignite your brilliant brain and unlock your exceptional life, allowing you to achieve and surpass all of your personal and professional goals.

Selected links from the episode:

Science Behind CAROL Bike

https://carolbike.com/science/

Products Mentioned:

CAROL Bike 

Code: KWIK for 10% off  / carolbike.com/kwik

100-Day Trial

Feel the benefits of CAROL Bike for yourself risk-free for 100 days. And if it’s not for you, return it and get a full refund.

Free Delivery

If you live in the mainland US, get your new CAROL Bike delivered for free in 7-14 days.

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The 80/20 Rule of Longevity: How to Extend Your Lifespan with Dr. Darshan Shah

Balancing Glucose for Better Brain Performance with Jessie Inchauspe

Ulrich Dempfle

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**This week’s show notes are taken from the video — enjoy!**

[4:05] What is REHIT training and the science behind it

[6:38] Link between REHIT and BDNF release in the body

[8:02] Improve your VO2 max and life expectancy by 12% in 8 weeks 

[10:45] Decrease the risk of metabolic diseases by 62% with 3 short workouts

[13:46] High intensity exercise helps to boost learning and memory more than low intensity

[19:40] Science behind how your body receives all of the benefits in just 5min 

[27:54] Small simple steps that will help to set up your psychology for a workout

[31:00] Special offer for Kwik Brain Community

[33:47] Jim’s CAROL routine that supports learning and memory

[35:45] Exercise helps to reset your circadian rhythm and increase sleep quality

 

Take a screenshot, tag us (@jimkwik & @thecarolbike) and share your biggest takeaway.

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