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.
The bike that gets you fittest, fastest.
CAROL Bike gives you the shortest, most efficient workout—backed by science. It’s the world’s first home REHIT exercise bike. Delivering the same health and fitness results as a 45-minute run—in just 5.
For a limited time only, use code MEMORIALDAY to get $200 off the bike that's changing how we train.
Short
Get the most efficient workout in just 5 minutes with CAROL Bike - short and easy to fit into your life.
Smart
AI-personalized workouts tailored to you – simple to perform and suitable for any age and fitness level.
Scientific
Scientifically proven to deliver superior health and fitness benefits in 90% less time compared to regular cardio.
Introducing Reduced Exertion HIIT
Developed by leading scientists, Reduced Exertion HIIT (REHIT) is designed to provide the shortest, most efficient exercise 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.
Your results, backed by science
CAROL Bike is scientifically researched and proven to improve your fitness and health. Just 3x5-minute REHIT rides a week will improve your cardio fitness by 12% in just 8 weeks.
Beyond its signature REHIT workouts, CAROL Bike operates as a fully customizable indoor cycling platform. In Free Ride mode, riders can train as they would on a traditional indoor bike, with control over timing, resistance, intensity, and target power. Integration with platforms like Zwift, YouTube, and Netflix allows for a more personalized riding experience, while Premium membership includes LES MILLS classes and music-driven classes.
Get FitterImprove your fitness by 12% in just 8 weeks.1 MIN READ
Live YoungerImproving your VO2max by 12% is like turning the clock back on your age by 10 years.1 MIN READ
Live HealthierReduce your risk of type 2 diabetes by 62%, and blood pressure by 5%.1 MIN READ
Next-level HIITWhy Reduced Exertion HIIT (REHIT) is the most effective workout.2 MIN READ
Maximum MetabolismYou'll burn more calories on a 15-minute CAROL ride than a 30-minute run.1 MIN READ
Time to thriveMake the most of your time with CAROL Bike's short and efficient REHIT workouts.1 MIN READ
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.
Intelligent design, explained
CAROL Bike is the only bike fully optimized for Reduced Exertion HIIT (REHIT), suitable for any age and fitness level, while offering greater versatility and choice than most other smart bikes.
AI-Personalized RideCAROL Bike's AI algorithm calibrates every moment on the bike to you.1 MIN READ
Why do you need a special bike?Discover the special features essential for easy and safe REHIT.2 MIN READ
Optimal designLearn about the rationale behind our key design choices.2 MIN READ
Innovation beyond comparisonDiscover how CAROL's unique concept and design set it apart from Peloton and other bikes.1 MIN READ
Unbeatable ValueDiscover how CAROL Bike offers great value for money.1 MIN READ
Risk-free 100-day trialExperience CAROL Bike for yourself with a risk-free home trial.1 MIN READ
Unlock the key to longevity
Learn how increasing your VO2max can help you live longer, healthier, and better in our free guide for enhancing longevity.
A simple habit, that works
Just 2x20-second sprints, 3x a week. Scientifically-proven to be the most efficient cardio workout, a moment of effort you can always master.
A Simple HabitNew riders hit an average of 3.2 rides a week, in their first 100 days.1 MIN READ
15 Minutes a WeekCAROL Bike's science-backed workouts. The short, smart, simple fit for your life.1 MIN READ
Your ProgressCAROL Bike's Fitness Score lets you track how your fitness is improving.1 MIN READ
Your Favorite AppsSeamlessly connect to apps like Zwift, Kinomap, Peloton Digital and more.1 MIN READ
Endless EntertainmentCAROL Bike integrates with entertainment apps like Netflix, Disney+, YouTube and more.1 MIN READ
CAROL Bike workout recommendationsFind the perfect CAROL Bike workouts for your health and fitness goals.4 MIN READ
Hear it from our riders
My CAROL Bike has been great to help me achieve greater fitness and power without the time investment but with all the fun!
In just 4 months, my VO2max has increased by about 12 points, and my heart rate has decreased by 10 bpm. For someone with a history of heart issues, these improvements are huge!
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.
CAROL Bike is the ultimate biohack. I get more cardiovascular benefit in 5 minutes than I used to get from 30-minute runs, and my recovery is faster too.
From our community, who know us best
Hear how our community of scientists, fitness thought-leaders and self-optimizers make the most of every workout with CAROL Bike.
Biohacker ApprovedDave Asprey on why CAROL Bike is the smartest workout for self-optimizers.2 MIN READ
'I love my CAROL Bike!'Dr. Michael Gervais on building a habit that compounds with high-performance routines.2 MIN READ
Benefits of a 45-minute run, in just 5Ben Greenfield on the science of REHIT and getting maximum cardiovascular benefit per minute.3 MIN READ
'Most Innovative Exercise Bike 2022'Garage Gym Reviews on why CAROL stands out from every other smart bike on the market.2 MIN READ
Good habits start here
Order CAROL Bike now, try it for yourself, and build a habit that lasts.
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.Fitness Advisors
All our experts have MScs in Exercise Science—here to help you achieve your fitness goals.Free Delivery
If you live in the mainland US, get your new CAROL Bike delivered for free in 7-14 days.0% APR Financing
You can buy your CAROL Bike with Affirm. And pay just $232.92 for 12 months at 0% APR.Bike Specifications
Grade
Fully commercial-grade exercise bike. Built for professional gyms.
Frame
Heavy-duty, powder-coated steel frame.
Instant Resistance
AI-controlled, motorized resistance applied instantly.
Brake
Silent, friction-free magnetic brake.
Power Measurement
The highest accuracy standard for professional gym equipment.
Handlebar
Ergonomic handlebars with 5 different grip positions.
Saddle
Designed for maximum comfort.
Q-factor
Optimal distance between pedals of 170 mm.
Pedals
Dual-sided toe cage and SPD click pedals, to maximize rider efficiency.
Cranks
Forged steel 170 mm crank arms.
Transmission
Silent poly-V belt with automatic belt tensioner, 1:8 gearing ratio and freewheel safety clutch.
Flywheel
Composite flywheel with steel core and brushed aluminum outer ring.
Power Requirements
100 V to 240 V
Screen
11.5" IPS touchscreen with 2K resolution (2000 x 1200)
Processor
MediaTek Helio G99 Octa-Core Processor
Graphics
Integrated ARM Mali-G57 MC2 GPU
Memory
6 GB RAM
Storage
128 GB internal storage
Sound
Quad Speakers, Optimized with Dolby Atmos
WLAN
WiFi 6E: 802.11 a/b/g/n/ac/ax
Bluetooth
Bluetooth 5.2
Ethernet
Wired ethernet via USB-C adaptor (not included)
Operating System
Android 13
Apps
Group classes with Peloton Digital, virtual rides with Zwift / Kinomap / Rouvy, entertainment via YouTube / Netflix / Disney+, news via CNN / Fox / NBC
Footprint
45.5" x 22"
Bike Weight
120 lb
Rider Requirements
Height 4'7" to 6'7", max weight 330 lbs
Space Requirement
45.5" x 45.5"
AI-Optimization
Our AI algorithm calculates your optimal resistance, for maximum results, so every second matters.
22 Workouts
Choose from 22 scientifically-proven workouts and fitness tests. With more added as the science advances.
Multiple Riders
Home membership gives access for up to 8 riders. Commercial membership tiers start at 24 riders.
Metrics
Personalized dashboard with comprehensive performance metrics like Fitness Score; so you can accurately track how your fitness is improving.
OTA Updates
CAROL Bike automatically adds new features, functionality and performance with over-the-air software updates.
Price
Home membership is $19.99/month (excl. sales tax). Commercial memberships start from $49/month (excl. sales tax).
Support
Customer support available via phone, chat, or email.
Delivery
If you live in the mainland US, Canada or UK, get your new CAROL delivered for free.
100-Day Home Trial
Try CAROL at home for 100 days. And if it's not for you, return it and get a full refund.
Paid Assembly
Get your CAROL Bike delivered fully assembled to your room of choice for $299.
DIY Assembly
With 7-step assembly, and support via phone, chat or email on-hand, setting up CAROL is simple.