The bike that gets you fittest, fastest.

  • Short

    Workouts from just 5 minutes. Short, effective—easy to fit into your life.

  • Smart

    AI-personalized with Instant Resistance—for double the health and fitness benefits in 10% of the time.

  • Scientific

    Developed with leading exercise scientists to give you the shortest, most effective workouts.

Your perfect workout, backed by science.

Reduced Exertion HIIT (REHIT) and AI-personalization make CAROL Bike unique.​ Just 2x20-second sprints create the most powerful training stimulus.

8 hacks for optimal fitness

Achieve your goals with less time and effort using this free guide—featuring 8 hacks for optimal strength and cardiovascular fitness from Dave Asprey's new book, Smarter Not Harder.

Good habits start here.

Order CAROL Bike now, try it for yourself—and build a habit that lasts.

  • 100-Day Trial

    Try CAROL Bike at home for 100 days. And if it’s not for you, return it and get a 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 7-10 days.

  • 0% Financing

    You can buy your CAROL Bike with Affirm. And pay just $216.25 for 12 months at 0% APR.