A smarter way to train without overdoing it.
Coach approved
CAROL Bike: Dylan Gemelli’s cardio of choice
Dylan Gemelli is a prominent figure in fitness and biohacking, known for his expertise in fitness, nutrition, cellular health, neuroscience, and anti-aging.
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Dylan Gemelli
on CAROL Bike
“The CAROL Bike has been a true game changer for me. I have been an avid over trainer the majority of my life, but CAROL has allowed me to maximize my workouts without overdoing it.”Dylan Gemelli
The shortest, smartest cardio workout for high performers.
After a lifetime of avid overtraining, Dylan uses CAROL Bike to maximize his workouts without adding unnecessary volume. It fits the way he thinks about training: intense, efficient, and focused on long-term quality of life.
Warm up
Pedal slowly for up to 2 minutes to prep for your first sprint.
Sprint 1
AI applies Instant Resistance. You push to your limits for 20 seconds, forcing 25-30% mobilization of muscular glycogen, releasing key signaling molecules.
Recover
Pedal slowly and recover for up to 3 minutes.
Sprint 2
Push again to your limits for 20-seconds to activate the signaling molecules released in Sprint 1. This tells your body it must get fitter, stronger.
Cool down
Light pedalling for 3 minutes, so blood pressure, heart rate, and breathing go back to normal.
Dylan Gemelli on CAROL Bike.
He is the creator of the Dylan Gemelli Podcast, featuring discussions with experts and influencers across health. His podcast hit #1 in Health and Fitness in October 2025, reached the top 10 overall, and is also a top 10 trending podcast on Spotify.
Apple Podcasts · Episode 130 · 55 min
What makes CAROL fit Dylan’s routine?
Maximum output, minimum volume
CAROL Bike gives Dylan a way to train hard without stacking more long cardio sessions onto an already intense lifestyle.
AI-personalized resistance
Every ride adapts to the rider in the moment, making the workout suitable for different ages, fitness levels, and goals.
Built for health alignment
Dylan’s work connects fitness, biohacking, longevity, mind-body health, and total health alignment. Dylan Gemelli
Your results,
supported by
science
Get Fitter
Improve your cardio fitness by 12% in just 8 weeks.
Save Time
Get all the benefits of a 45-minute run in just 5.
Live Healthier
Reduce your risk of type 2 diabetes by 62% - and your blood pressure by 5%.
Live Younger
Improving your VO2max by 12% is like turning your body clock back 10 years.
The shortest, most efficient workout—backed by science
Developed by leading scientists, Reduced Exertion HIIT (REHIT) is designed to provide the shortest, most efficient workout. Just 2x20-second sprints create the most powerful training stimulus. With CAROL's AI-personalization making it suitable for any age and fitness level.
Warm up
Pedal slowly for up to 2 minutes to prep for your first sprint.
Sprint 1
AI applies Instant Resistance. You push to your limits for 20 seconds, forcing 25-30% mobilization of muscular glycogen, releasing key signaling molecules.
Recover
Pedal slowly and recover for up to 3 minutes.
Sprint 2
Push again to your limits for 20-seconds to activate the signaling molecules released in Sprint 1. This tells your body it must get fitter, stronger.
Cool down
Light pedalling for 3 minutes, so blood pressure, heart rate, and breathing go back to normal.
Optimized for maximum effectiveness and safety
CAROL Bike offers all essential features to make REHIT easy, effective and safe. All components have been meticulously engineered to provide the optimal riding experience.
- Optimized for REHIT
- AI-personalized to your fitness and goals
- Commercial grade quality frame
- 22+ science-backed workouts
- Integration with third party apps
- And more
Dylan talks with CAROL Bike co-founder Ulrich Dempfle.
In this episode of The Dylan Gemelli Podcast, Dylan and Ulrich discuss REHIT, VO2 max, overtraining, and how CAROL Bike helps riders get powerful cardio results in a fraction of the time.
From our community, who know us best.
Hear how scientists, fitness thought-leaders and self-optimizers get the most out of CAROL Bike every day.
Biohacker Approved
Dave Asprey, the father of biohacking on CAROL Bike: “This is real!”
“I love my CAROL Bike!”
Performance psychologist Dr. Michael Gervais.
Benefits of a 45-minute run-in just 5
CAROL riders on building a lasting habit with efficient workouts.
“Most Innovative Exercise Bike 2022”
As awarded by Garage Gym Reviews, the #1 trusted home gym equipment review site.
Unlock the future of fitness
CAROL Bike's short, AI-personalized programs are designed to get you fitter, faster.
It's the ultimate fitness tool for anyone seeking better results in less time.
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 regular exercise—in 90% less time.
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.
CAROL Bike is scientifically proven to improve your cardio fitness by 12%—in just 8 weeks. That's like turning the clock back on your age by 10 years.
Developed with leading exercise researchers and scientists, CAROL Bike’s range of scientifically-proven workouts make it the world’s most effective exercise bike.
Order your CAROL Bike today
Experience the shortest, most efficient workouts—
backed by science.
Use code DYLAN to get £300 off.
Save £300Code DYLAN
Shop CAROL Bike- 100-day risk-free home trial
- 0% APR financing option
- 5-year frame warranty
- 1x free heart rate chest belt
Join our 35,000+ 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.
Dylan’s work focuses on improving quality of life through the mind-body connection, emphasizing that the mind and body influence each other. He also speaks about connection with God as part of total health alignment, and has dedicated his work to helping people achieve the highest quality of life.
Save £300
Use code DYLAN 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 on the UK mainland, 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.