Read real reviews from riders who’ve experienced CAROL’s benefits themselves.
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Research shows you’ll get CAROL’s huge health and fitness gains in 8 weeks. Discover the benefits from the scientists, journalists, biohackers, and riders who know best.
Explore our reviews, press and video testimonials below.
Loved by health and fitness influencers
Health influencer Michael Kummer tests out CAROL from a CrossFitter’s perspective
Michael’s a healthy living and tech enthusiast who loves science and doesn’t believe anything unless there’s proof. Check out his in-depth video review of CAROL (and notice his surprise when he doesn’t sweat during a workout!)
Journalist Lara Lewington reviews CAROL in a mini documentary for the BBC
Lara tests out CAROL’s AI capabilities and health benefits for a short BBC documentary. See what she thinks after putting the bike through its paces, and get insights into the science behind our workouts.
Fitness influencer Sky Life tries CAROL for 30 days in this candid review
Health enthusiast Sky Cowans tests out the CAROL for a full 30 days to get a deeper understanding of how it works. In this video, you’ll see her progress throughout the month, and what she makes of our smart AI that adapts to your performance.
ONLY CAROL uses AI that really helps me – I can feel my body get a max intensity workout every single time. And they tell the truth – not breaking a sweat. Add the impeccable product design and engaged, friendly, always useful product support and CAROL’s a top reason to get up and get on every morning!
Let’s be honest, it’s so easy to blow off a 45-minute workout but a 9-minute workout?? No excuses! Thank you for keeping fitness accessible despite the battles of life. With CAROL on my side, I can keep my fitness goals and regain my health!
All I can say is nothing matches the return on investment that this bike provides. Everything from the high quality construction, effectiveness , and the variety of training rides have made this the best investment in my long term health and fitness.
I have lost 41 lbs since starting with CAROL in July of 2020. I am in the best “physical condition” that I’ve been in since my early forties, and I’ve had significant medically demonstrable improvements in my health!
Trusted by health and fitness pros
“This is real. You’re spending 1/5th the amount of time on CAROL bike and you’re getting twice the results.”
Founder, Bulletproof and Upgrade Labs
— Hear why Dave loves CAROL on Bulletproof Radio
“In our labs, we see insulin sensitivity improve by 25-28% and fitness by 15% within 6 weeks. The CAROL bike reproduces these results in the real world.”
Dr. Niels Vollaard, PhD
REHIT Researcher, University of Stirling
“Interval training is the closest thing we have to an exercise pill. A tiny bit of sprint training has the same effect on the human body as a whole lot of endurance training.”
Martin Gibala, PhD
Author, the One Minute Workout
— Read about the CAROL bike in the One Minute Workout
Read what top journalists from trusted global publications think about CAROL after testing it at home for 8 weeks.