Biohacker approved
Dave Asprey, the father of biohacking, names CAROL Bike as the ultimate cardiovascular exercise hack in his book Smarter Not Harder. CAROL isn’t just the smartest, most effective exercise bike he’s tried—every workout is backed by science too.
Save $100 with code DAVE.
“This is real. CAROL Bike gives you superior results compared to traditional exercise—in 90% less time.”
CAROL’s science-backed workouts make it the world's most effective exercise bike. In fact, Dave Asprey is such a believer in the cardio biohacking power of CAROL that he mentions it as his cardio of choice in his book Smarter Not Harder. You'll also find CAROL Bikes at all of Dave Asprey's Upgrade Labs, which are the world's first Human Upgrade Centers.
Get Fitter
Improve your VO2max by 12% in just 8 weeks.
Live Younger
Improving your VO2max by 12% is like turning your body clock back 10 years.
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%.
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.
Pedal slowly for up to 2 minutes to prep for your first sprint.
AI applies Instant Resistance. You push to your limits for 20 seconds, forcing 25-30% mobilization of muscular glycogen, releasing key signaling molecules.
Pedal slowly and recover for up to 3 minutes.
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.
Light pedalling for 3 minutes, so blood pressure, heart rate, and breathing go back to normal.
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.
Dave Asprey talks with CAROL CEO and co-founder, Ulrich Dempfle, about the scientifically proven benefits of CAROL Bike.
"It’s the rapid onset of glycogen depletion that makes the difference. So it’s exactly that slope of the curve that releases the signaling molecules that tells your body it has to get fitter and stronger.” – Ulrich Dempfle, CAROL CEO
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.
"I’ve been training for a half marathon and since adding CAROL Bike to my daily routine in the past 2 weeks, my VO2max has gone up 5% already."
"My CAROL Bike has been great to help me achieve greater fitness and power without the time investment but with all the fun!"
"It's easy to fit a quick 5-minute workout in, especially if you don't need to shower after your workout!"
"It is a keystone health habit builder that not only makes you feel better but makes you more conscious of acting in healthier ways throughout the day."
"Dropping 2.6% bodyfat in ~8 weeks for someone who prioritizes a healthy lifestyle is no easy feat. I’d go so far as to label it as a gamechanger."
"If you’re looking for a quick, effective biohack to improve your cardiovascular health, increase your endurance in an efficient way... this seems to be the move."
"CAROL has been a really great way for me to keep active, for me to keep moving without putting too much stress on my body."
Read real reviews from riders who’ve experienced CAROL’s benefits themselves.
Shauna Murphy
"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!"
Joel Evan
"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!”
Andrea Miller
“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.”
Hear how our community of scientists, fitness thought-leaders and self-optimizers get the most out of CAROL Bike every day.
Order CAROL Bike now, try it for yourself—and build a habit that lasts.
Save $100
Use code DAVE at checkout to save $100 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.
Free Delivery
If you live in the mainland US or Canada, get your new CAROL Bike delivered for free.
0% APR Financing
You can buy your CAROL Bike with Affirm. And pay just $207.92 for 12 months at 0% APR.
