Exclusive Longevity Fest offer

CAROL Bike: your most efficient longevity tool

Save $250 on your CAROL Bike purchase with code LONGEVITYFEST.

Minutes of effort. Years of rewards.

Developed with leading exercise researchers, CAROL Bike offers the most efficient VO₂max training—boosting your cardiovascular health and fitness in just minutes. In fact, CAROL is scientifically proven to deliver superior fitness and longevity benefits in 90% less time compared to regular cardio. Making it the most efficient VO₂max training tool.

What makes CAROL Bike special?

The shortest, most efficient workouts

Our signature Reduced Exertion HIIT (REHIT) workout creates the most potent training stimulus with just 2x20-second sprints. It’s scientifically proven to deliver superior longevity benefits compared to normal exercise—in 90% less time.

Personalized to your fitness and goals

CAROL Bike's AI-personalization means it's suitable for any age and any fitness level. Our AI learns to push you to your limit, applying automatic and instant resistance, to ensure your workouts are most effective for you.

Significant results in just 8 weeks

Only 2x20-second sprints, 3x a week is scientifically proven to improve your VO₂max by 12% in just 8 weeks. That's like turning the clock back on your age by 10 years.

How the REHIT adaptation pathway works

CAROL’s AI-personalization helps you push to your limits during the sprints. Like in a ‘fight or flight’ situation, your muscles are forced to mobilize about 25-30% of muscular glycogen—your emergency energy reserve—releasing key signalling molecules (AMPK and PGC-1a), telling your body it must get fitter and stronger.

You develop more mitochondria, your blood plasma volume increases, and your heart gets stronger. Resulting in increased aerobic and anaerobic capacity.

Get meaningful results in just 8 weeks

Get fitter

Improve your VO₂max by 12%—in just 8 weeks.

Live younger

Improving your VO₂max by 12% is like turning the clock back on your age by 10 years.

Live healthier

Reduce your risk of type 2 diabetes by 62%—and blood pressure by 5%.

Save time

Get all the benefits of a 45-minute run in just 5.

CAROL Bike

Starting at: ~~$2,595~~ $2,345 (or $195.42/month with Affirm).

CAROL membership: $19.99/month.

Highlights:

The only bike fully optimized for REHIT
22+ workouts to choose from
Fully commercial-grade exercise bike
AI-controlled, motorized resistance applied instantly
45.5″ x 22″ space requirement, smaller than your average yoga mat

Looking to use CAROL in your commercial space?

Speak to a member of our team for our commercial offering.

"A groundbreaking piece of exercise equipment"

"For those short on time, it’s worth the investment."

“Ipsum perspiciatis voluptate harum officiis deleniti.”

"You’ll get maximum results from the shortest workout possible."

"Who wouldn’t want to work out for just five minutes a day and see a difference?"

"If you’re looking to revamp your at-home fitness lineup, CAROL Bike is here."

Everett Myers

3 months

"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."

Everett Myers

3 MONTHS

49.2+9%

Fitness score

Dr Gabriela Moreno

3 months

"My CAROL Bike has been great to help me achieve greater fitness and power without the time investment but with all the fun!"

Dr Gabriela Moreno

1.5 YEARS

36.3+52%

Fitness score

Phil Cox

3 months

"It's easy to fit a quick 5-minute workout in, especially if you don't need to shower after your workout!"

Phil Cox

5 MONTHS

32.9+9%

Fitness score

Ann Meyers

3 months

"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."

Ann Meyers

3 MONTHS

26.6+12%

Fitness score

Peter Bauman

3 months

"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."

Peter Bauman

9 MONTHS

32.3+5%

Fitness score

Germany Mayfield

3 months

"If you’re looking for a quick, effective biohack to improve your cardiovascular health, increase your endurance in an efficient way... this seems to be the move."

Germany Mayfield

9 MONTHS

34.3+12%

Fitness score

Everett Myers

3 months

"CAROL has been a really great way for me to keep active, for me to keep moving without putting too much stress on my body."

Everett Myers

3 MONTHS

30.3+10%

Fitness score

Real riders, real results.

Our riders are at the heart of everything we do. Discover the real impact of CAROL Bike straight from those reaping the benefits every day.

Michael Kummer CAROL rider for 3 years

Christy Lemire CAROL rider for 1 year

Joel Evan CAROL rider for 2 years

Amy Stanton CAROL rider for 1 year

Join our 30,000+ rider community

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

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.

Unlocking fitness excellence with Dave Pascoe

Discover how CAROL Bike is the optimal fitness solution for biohacker, Dave Pascoe.

3 MIN READ

Biohacker Approved

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

1 MIN READ

“I love my CAROL Bike!”

Performance psychologist Dr. Michael Gervais.

1 MIN READ

Benefits of a 45-minute run—in just 5

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

1 MIN READ

CAROL Bike on "Better with Dr. Stephanie” Podcast

Discover the power of REHIT for optimizing health with Dr. Stephanie Estima.

1 MIN READ

Good habits start
here

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

Save $250

Use code LONGEVITYFEST at checkout to save $250 off your CAROL Bike purchase.

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.

0% APR Financing

You can buy your CAROL Bike with Affirm. And pay just $195.42 for 12 months at 0% APR.

HSA/FSA approved

For qualified customers, use your HSA/FSA funds and save 30-40% on your CAROL Bike purchase using pre-tax dollars.

Exclusive Longevity Fest offer

CAROL Bike: your most efficient longevity tool

Minutes of effort. Years of rewards.

What makes CAROL Bike special?

How the REHIT adaptation pathway works

Get meaningful results in just 8 weeks

CAROL Bike

Looking to use CAROL in your commercial space?

"A groundbreaking piece of exercise equipment"

Real riders, real results.

Join our 30,000+ rider community

From our community, who know us best.

Good habits start
here

Explore

Support

About Us

Stay in the loop

Stay in the loop

Heart Rate Armband — $139

Heart Rate Chest Belt — $75

Phone Holder — $49

Exclusive Longevity Fest offer

CAROL Bike: your most efficient longevity tool

Minutes of effort. Years of rewards.

What makes CAROL Bike special?

How the REHIT adaptation pathway works

Get meaningful results in just 8 weeks

CAROL Bike

Looking to use CAROL in your commercial space?

"A groundbreaking piece of exercise equipment"

Real riders, real results.

Join our 30,000+ rider community

From our community, who know us best.

Good habits start here

Explore

Support

About Us

Stay in the loop

Stay in the loop

Order Summary

Upgrade Your Ride

Heart Rate Armband — $139

Heart Rate Chest Belt — $75

Phone Holder — $49

Subtotal

Good habits start
here