CAROL Bike

The cutting-edge AI bike designed for REHIT workouts. Achieve maximum results in minimal time with this revolutionary exercise bike—delivering the shortest, most effective workouts.

CAROL Bike

Try CAROL Bike risk-free with a 100-day home trial and enjoy fast shipping on your order.

CAROL membership: £19.99/month.

Estimated delivery: 7-14 days.

Accessories

CAROL heart rate armband photographed on a plain background

Heart Rate Chest Belt — $79

Heart rate chest belt seamlessly connects to CAROL Bike to track your performance.

CAROL branded exercise mat, close view

Bike Mat — $69

High-spec PVC bike mat, designed to protect your floor while you pedal.

CAROL Bike tablet holder photographed on a plain background

Phone Holder — $59

Designed to keep you connected to the outside world, while you workout.

Fast Delivery

If you live in the mainland US, get your new CAROL Bike delivered to your door.

100-Day Home Trial

Try CAROL Bike at home for 100 days. If it’s not for you, return it and get a refund.

0% APR Financing

Pay from just £199.58/month at 0% APR when buying with Klarna.

The best exercise bike of choice for HIIT and REHIT workouts

CAROL Bike is the ultimate solution for HIIT on a stationary bike—and is the world’s only bike with Reduced Exertion HIIT (REHIT) workouts.

CAROL’s AI algorithms precisely calibrate your optimal resistance and speed, tailoring them to your unique fitness level—and apply them at exactly the right time. Making REHIT possible outside of a lab setting for the first time. Explore 18 dynamic workout options, including built-in HIIT variations.

With its innovative design and cutting-edge technology, CAROL Bike delivers the shortest, most effective stationary bike workout for any age and fitness level.

How to do a REHIT workout

REHIT workouts and AI-personalization make CAROL Bike unique. Just 2×20-second sprints on this AI bike create the most powerful training stimulus. Here’s how our signature REHIT workout works:

  • Warm up: 20-seconds to 2-minute
  • Sprint 1: 20-seconds
  • Recovery: 1-minute to 3-minutes
  • Sprint 2: 20-seconds
  • Recovery: 1-minute to 3-minutes

Get meaningful results in just 8 weeks

CAROL Bike’s short, effective workouts mean you can achieve double the health and fitness benefits of regular exercise—in 90% less time. And the best part—it’s all backed by science.​

Get fitter. Improve your cardio fitness by 12% in 8 weeks with just 3×5-minute REHIT workouts a week. Close to double the improvement vs on a regular exercise bike—in 90% less time.

Live healthier. Reduce your risk of type 2 diabetes by 62% and blood pressure by 5% with CAROL Bike’s scientifically proven REHIT workouts.

Lose weight. Burn twice as many calories on CAROL Bike, the ultimate stationary bike for weight loss, compared to regular exercise.

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.

Rider on a CAROL Bike against a purple geometric wall

Dave Asprey, the father of biohacking on CAROL Bike: “This is real!”

Portrait of a man in a black shirt, indoors

Performance psychologist Dr. Michael Gervais.

Rider in a green hooded top seated at a CAROL Bike

Hear from Human Performance Consultant Ben Greenfield, on the habit of working out.

Rider looking down at the twin screens of a CAROL Bike

As awarded by Garage Gym Reviews, the #1 trusted home gym equipment review site.