Michael Kummer
CAROL rider for 3 years
Hal Elrod's fitness game-changer: CAROL Bike
Author approved
Hal Elrod's fitness game-changer: CAROL Bike
CAROL Bike gives you the shortest, most effective workouts—proven to deliver superior health and fitness benefits in 90% less time compared to regular cardio. This incredible time-saving efficiency is why Hal Elrod endorses CAROL Bike as the ultimate tool for those seeking to unlock their full potential in both life and fitness.
Shop CAROL Bike
Hal Elrod
on CAROL Bike
Hal understands the value of time and potential, which is why he’s thrilled to offer his community a special $300 discount.
Saves you time. Gets you fit. Builds a habit.
CAROL’s AI-personalized workouts are easy to follow, suitable for any age and fitness level, and create the most potent training stimulus with just 2x20-second sprints. It’s a moment of effort you can always master to build a habit that lasts.
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.
Your results,
supported by
science
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.
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.
Christy Lemire
CAROL rider for 1 year
Joel Evan
CAROL rider for 2 years
Amy Stanton
CAROL rider for 1 year
The shortest, most efficient workout—backed by science
Developed by leading scientists, Reduced Exertion HIIT (REHIT) is designed to provide the shortest, most efficient 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.
Pedal slowly for up to 2 minutes to prep for your first sprint.
AI applies Instant Resistance. You push to your limits for 20 seconds, forcing 25-30% mobilization of muscular glycogen, releasing key signaling molecules.
Pedal slowly for 3 minutes, clearing lactate and preparing for your second sprint.
Push again to your limits for 20-seconds to activate the signaling molecules released in Sprint 1. This tells your body it must get fitter, stronger.
Light pedalling for 3 minutes, so blood pressure, heart rate, and breathing go back to normal.
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.
Biohacker Approved
Dave Asprey, the father of biohacking on CAROL Bike: “This is real!”
“I love my CAROL Bike!”
Performance psychologist Dr. Michael Gervais.
Benefits of a 45-minute run—in just 5
Hear from Human Performance Consultant Ben Greenfield, on the habit of working out.
“Most Innovative Exercise Bike 2022”
As awarded by Garage Gym Reviews, the #1 trusted home gym equipment review site.
Order your CAROL Bike today
Use code HAL to save $300 off CAROL Bike—for a limited time only.
Save $300Code HAL
Shop CAROL BikeJoin our 35,000+ rider community
Read real reviews from riders who’ve experienced CAROL’s benefits themselves.
"Exercising smarter with CAROL is improving my health week after week. The AI personalization takes any guesswork out of my workouts, so I continue to be challenged and exceed my goals. I am a powerful example of CAROL Bike’s effectiveness!"
"The most significant barrier for me and my busy clients is TIME, and CAROL removes that; in just 5-10 minutes, you get a cardio workout equivalent to 45 mins. Absolute game-changer!”
“CAROL has been a game changer for me. The REHIT Intense ride is revolutionary in the fitness realm. It’s the most effective way to get the fittest, the fastest.”
“This will help anyone get into the habit of exercising and will also support high performance athletes in reaching higher levels of strength and fitness. I recommend the purchase of CAROL without any hesitation!”
“The transformative impact on how my body feels has made CAROL my undisputed go-to for cardio workouts. As a sports medicine practitioner, I highly recommend it.”
Good habits start
here
Order CAROL Bike now, try it for yourself—and build a habit that lasts.
Save $300
Use code HAL at checkout to save $300 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.
Fast Delivery
If you live on the UK mainland, get your new CAROL Bike delivered to your door.
0% APR Financing
You can buy your CAROL Bike with Affirm. And pay just $232.92 for 12 months at 0% APR.