Exclusive offer for Dr. Gundry podcast listeners
Podcast listener offer
Exclusive offer for Dr. Gundry podcast listeners
Save £300 on your CAROL Bike purchase with code GUNDRY.
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Exclusive offer for Dr. Gundry podcast listeners
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“This is an anti-aging machine.”Dr. Steven Gundry, Cardiologist, heart surgeon, medical researcher, and author
The shortest, most effective workouts—backed by science
Developed with leading exercise researchers, CAROL Bike offers science-backed workouts proven to improve key health and fitness indicators in just minutes. In fact, you can achieve superior fitness benefits in 90% less time compared to steady-state cardio. It's the exercise of choice for leading health and fitness figures like Dr. Gundry—saving hours of time while achieving superior results.
What makes CAROL Bike special?
The shortest, most effective workouts
Our signature REHIT workout creates the most potent training stimulus with just 2x20-second sprints. It’s scientifically proven to deliver superior health and fitness benefits compared to steady-state cardio—in 90% less time.
Personalized to your fitness and goals
CAROL Bike's AI-personalization means it's suitable for any age and any fitness level. Our AI learns to push you to your limit, applying automatic and instant resistance, to ensure your workouts are most effective for you.
Significant results in just 8 weeks
CAROL Bike is scientifically proven to improve your VO2max by 12%—in just 8 weeks. That's like turning the clock back on your age by 10 years.
Optimized for maximum results
CAROL was developed with top exercise researchers to deliver the shortest, most efficient workouts. All components have been meticulously engineered to provide the optimal riding experience. While offering more choice and versatility than most other smart bikes.
Get meaningful results in less time
CAROL Bike's short, effective workouts mean you can achieve superior health and fitness benefits compared to traditional exercise—in 90% less time. And the best part—it’s all backed by science.
Get fitter
Improve your cardio fitness by 12%—in just 8 weeks.
Live healthier
Reduce your risk of type 2 diabetes by 62%—and blood pressure by 5%.
Lose weight
Burn twice as many calories on CAROL Bike than regular exercise.
Save time
Get all the benefits of a 45-minute run in just 5.
Real riders, real results.
Our riders are at the heart of everything we do. Discover the real impact of CAROL Bike straight from those reaping the benefits every day.
The Dr. Steven Gundry Podcast
Dr. Steven Gundry sits down with CAROL CEO and co-founder, Ulrich Dempfle, to break down the science behind cardio, efficiency, and why REHIT is the better approach for most people than Zone 2 training.
"People know how important exercise is. And somehow we don’t have the time. But folks, I can do it in my suit, so you, you can do this.” – Dr. Steven Gundry
From our community, who know us best.
Hear how our community of scientists, fitness thought-leaders and self-optimizers get the most out of CAROL Bike every day.
Join our 30,000+ rider community
Read real reviews from riders who’ve experienced CAROL’s benefits themselves.
"Exercising smarter with CAROL is improving my health week after week. The AI personalization takes any guesswork out of my workouts, so I continue to be challenged and exceed my goals. I am a powerful example of CAROL Bike’s effectiveness!"
"The most significant barrier for me and my busy clients is TIME, and CAROL removes that; in just 5-10 minutes, you get a cardio workout equivalent to 45 mins. Absolute game-changer!”
“CAROL has been a game changer for me. The REHIT Intense ride is revolutionary in the fitness realm. It’s the most effective way to get the fittest, the fastest.”
“This will help anyone get into the habit of exercising and will also support high performance athletes in reaching higher levels of strength and fitness. I recommend the purchase of CAROL without any hesitation!”
“The transformative impact on how my body feels has made CAROL my undisputed go-to for cardio workouts. As a sports medicine practitioner, I highly recommend it.”
Good habits start
here
Order CAROL Bike now, try it for yourself—and build a habit that lasts.
Save £300
Use code GUNDRY at checkout to save £300 off your CAROL Bike purchase.
100-Day Home Trial
Try CAROL Bike at home for 100 days. And if it’s not for you, return it and get a refund.
Fast Delivery
If you live in the UK mainland, you can get your new CAROL Bike delivered to your door.
0% APR Financing
You can buy your CAROL Bike with Klarna. And pay just £199.58 for 12 months at 0% APR.