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Biohacker approved

CAROL Bike: Dave Asprey’s
cardio of choice

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.


Use code DAVE at checkout for $100 off.


Time-saving, habit-forming—and scientifically proven to get you fittest, fastest.

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.

What sets CAROL
Bike apart?

Shortest, most effective workouts

Just 5 minutes, 3x a week. Scientifically proven to deliver results and designed for time-poor people.

Personalized to your fitness and goals

CAROL Bike's AI-personalization makes it suitable for any age and fitness level.

Significant results in 8 weeks

CAROL Bike is proven to improve your VO2max by 12% in just 8 weeks, effectively turning back the clock by 10 years on your physical fitness.

Play Video

Listen to Dave's podcast with Ulrich Dempfle, CEO and co-founder at CAROL

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

Your results,
supported by

Get Fitter

Improve your cardio fitness by 12% in just 8 weeks.

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%.

Live Younger

Improving your VO2max by 12% is like turning your body clock back 10 years.

Join our 25,000+ rider community

Read real reviews from riders who’ve experienced CAROL’s benefits themselves.

Good habits start

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

$100 Off

Use code DAVE at checkout for $100 off your CAROL Bike.

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.

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8 hacks for optimal fitness

Get your free guide to improve cardio and strength based on Dave Asprey's new book.