THE CAROL bike is designed BY SCIENTISTS,ENGINEERS & DOCTORS in the lab for enjoying at home.That’s just a taster of what it took to bring you an AI-enabled exercise smart bike that allows you to attain results that were previously only observed in the lab.

This is real.You’re spending one-fifth the amount of time on CAROL bike and you’re getting twice the results.”  – Dave Asprey, Founder of Bulletproof 

CAROL Bike 

What makes CAROL unique?CAROL bike features

DESIGNED BY SCIENTISTS TO DELIVER RESULTS

You want a special bike for special results

During a CAROL sprint, the maximum effort levels are roughly three times higher than in HIIT cycling courses. On a typical exercise bike, this kind of performance is unachievable.

You’d have to:

  • Use the proper resistance (just in your sweet spot)
  • In a fraction of a second, at the right time (just after you’ve built up speed at a low resistance) (instantly go from very low to very high)
  • To put it another way, it’s quite tough to succeed without the help of an exercise physiologist.

It’s simple to conduct high-intensity sprints and achieve maximum performance on a CAROL bike.Simply go on the bike, log in, and the bike will guide you through two 20-second maximum intensity sprints (personalized resistance) interspersed with mild warm-up, recovery, and cool-down intervals.

DESIGNED BY ENGINEERS FOR GREATER QUALITY

Shorter, smarter workouts

You don’t have to be concerned with altering your resistance or keeping track of your production. CAROL takes care of everything for you, automating and leading you through each high-intensity sprint so you can concentrate on going all out.

The program learns your abilities, tracks your progress, and tailors each ride to push you to your limits. Our computer-controlled magnetic brake technology provides tailored and carefully calibrated resistance at precisely the appropriate time and rate.

CAROL has been certified to the most exacting standard for commercial-grade ergometers, and the bike’s sensors and algorithms will use CAROL’s patented Octane Score to properly assess your performance and fitness level.

CAROL will make it harder as you get fitter, and if you’ve been on vacation and aren’t where you were when you left, CAROL will make it easier.

Over the course of eight weeks, 32 individuals were divided into two groups to assess the effectiveness of CAROL’s workouts and compare them to current government exercise guidelines.

DESIGNED BY DOCTORS TO KEEP YOU SAFE

Safety in the saddle

CAROL’s ultimate goal is for people to have healthy hearts. CAROL includes an integrated heart rate monitor and built-in safety algorithms that will warn you or even cancel your ride if something unusual is noticed.

Scientists meticulously created and tested CAROL’s maximum intensity sprint routines to give you enough time to recover so that your blood pressure and metabolism return to normal after pushing to your intensity limits.

On a CAROL bike, you’re in good hands as you go all-out for optimum results. The commercial-grade frame can endure the most extreme forces, and the freewheel clutch allows for safe explosive sprints with quick acceleration and deceleration.

DESIGNED WITH YOU IN MIND

Personalized design, personalized service

CAROL is the world’s easiest and most basic exercise system.

The workouts are appropriate for people of all ages and fitness levels. CAROL includes numerous safety safeguards, and its quick intensive exercises are less taxing than lengthier interval fitness regimens.

Whatever your fitness objectives, CAROL bike can assist you in achieving them, and as part of the service, we provide personalized consultations with our customer success team.

Carol AI-Powered Exercise Bike

Get a personalized effective workout.

 

CAROL bike workouts health benefits

Become more fit and healthy

CAROL is the most efficient technique to increase your aerobic capacity, resulting in leaner, fitter, and healthier results.

Reduce your weight

The ‘after burn’ feature on CAROL bike burns more calories after you get off the bike than it does while you’re on it. Insulin sensitivity improvements help you become more metabolically versatile and efficient at burning fat for energy.

Take care of your health

CAROL’s workouts are shorter than other forms of exercise, putting less effort on your body while yet giving various health advantages.

Variety is better

CAROL may be used with Peloton Digital and Apple Fitness+ programs, and it will soon allow you to participate in a Zwift or Kinomap race.

Double your fitness in 26 minutes per week with the world’s first AI bike.

 

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THE SCIENCE BEHIND CAROL 5 minutes workout  – Science and technology combined

4 academic collaborations.There have been several peer-reviewed studies.An active research and development program, as well as a data science staff. CAROL pushes the boundaries of HIIT research in academia.

How does CAROL bike work?

WORKOUT WITH NTENSE:

Step 1 – Warm up

It takes 2 minutes. Slow pedaling will prepare you for the sprints.

Step 2 – Sprint

It just takes 20 seconds. Within 10-15 seconds of your initial sprint, your glycogen will be depleted, and chemicals that signal other changes will be released.

Step 3 – Recovery

It only takes 3 minutes. Recovery is critical for a successful second sprint.

Step 4 – Sprint

It just takes 20 seconds. The molecules released during the initial sprint are now triggered, resulting in a series of changes that result in a fitter, leaner, and healthier you.

Step 5 – Cool Down

It only takes 3 minutes. These three minutes lower your blood pressure and return you to “normal” after all of your hard effort. CAROL provides mindfulness breathing guides that will help you de-stress in minutes and get back to whatever you were doing.

 

Prioritize quality over quantity

CAROL combines science, technology, and artificial intelligence to provide you with the greatest outcomes in the shortest time possible. For a hectic lifestyle, this is the ideal scenario.

CAROL automatically provides the correct resistance at the right speed at the right time for your fitness level, based on the scientifically proven benefits of REHIT (Reduced Exertion High Intensity Training) and fast glycogen depletion.

As a result, maximal exertion levels during a CAROL sprint are roughly three times higher than in HIIT spin courses, and it provides more health and fitness benefits in a fraction of the time as compared to traditional exercise.

What is REHIT?Maximum vs. high intensity

In a nutshell, REHIT is the distinction between high-intensity training and maximum-intensity training.

It’s based on the idea that fewer, shorter bursts of maximum intensity create better results, and it uses two 20-second all-out bursts to swiftly drain your thigh muscles’ glycogen stores. Because you spend less effort than in regular HIIT sessions, the phrase Reduced Exertion High Intensity Training was coined.

Previously, the REHIT effect could only be achieved in a lab setting. You may now enjoy the benefits in the comfort of your own home, thanks to CAROL.

Since the release of the CAROL bike in 2024, it has been able to get the health and fitness advantages of a 45-minute run in just 8 minutes 40 seconds.

This brief, effective cardio workout is based on peer-reviewed scientific research into a time-efficient alternative to regular exercise known as low effort high-intensity interval training (REHIT).

Four years later, the newest CAROL bike update now allows you to get the health advantages of REHIT in just 5 minutes. That’s right, the most efficient and effective cardio workout just became much more efficient! 

How does REHIT work?

The physiological underpinning of REHIT is that high-intensity exercise causes your body to enter fight or flight mode, raising its energy needs by a factor of 100. After all, your body has no notion you’re sprinting on an AI-powered exercise bike rather than fleeing a predator.

Because your body has no clue how long you will need to sprint, the increased energy demand forces your muscles to mobilize substantially more glycogen (stored sugar) than is really necessary for two brief sprints. This quick depletion of energy reserves triggers physiological adjustments that make you fitter and stronger. After all, perhaps the next time you’ll need to run even faster and further to avoid the ‘predator.’

Delve deeper into the science of muscle glycogen depletion

CAROL is the only exercise bike that provides true REHIT because its AI personalizes your workouts to ensure that you always reach your personal maximum intensity. Dr Niels Vollaard, a health and exercise science in sport researcher from the University of Stirling, explains it thus way:

“Outside of the labs, CAROL is the only system that accurately duplicates my research.” This scientific exercise cannot be performed on a standard bike because to the supra-maximal resistance necessary, which must also be customized to each individual’s physiology.”

The science behind the new 5-minute REHIT exercise from CAROL bike

This is the structure of the REHIT protocol utilized in CAROL’s initial 8-minute 40-second Intense ride:

  • 2 minutes to warm up
  • Sprint 1 – 20 seconds
  • 3 minutes of recovery
  • 2 – 20 second sprint
  • 3 minutes of rest

According to research, the physiological impact of REHIT is derived from the highest effort sprint phases. That got us thinking: might we minimize the non-sprint periods without sacrificing overall health and fitness benefits?

Dr. Vollaard said, “The health and fitness advantages of REHIT are activated by two 20-second maximal intensity sprints.” The duration of the warm-up has no effect on the efficacy of REHIT.”

Thus far, so good. But what about rest periods in between sprints? “In order to get the maximum health and fitness advantages of REHIT, your recovery time between sprints must be sufficient to allow for a powerful second sprint.”

You’re thinking: how long is “long enough”? That is all up to you. It’s best to wait until you’ve regained your breath, but it may be anytime you’re ready to go all-out again.

The cooldown timer stays at three minutes. “It’s vital for blood pressure to equalize again after the race,” says Ulrich Dempfle, CEO and co-founder of CAROL. According to research, mild pedaling accomplishes this faster than simply sitting or standing. This is due to the fact that keeping the muscles active aids in pumping blood back to the heart and hastening the clearance of ‘waste’ products from the muscle, so minimizing the imbalance between the concentration of such particles inside and outside the muscle cell.”

To conclude, the health advantages of REHIT are found in the sprints at maximal effort. And, while a cooldown is necessary to ensure your body returns to normal before getting off the bike, warm-up time has no effect, and recovery phase duration is unique to you.

CAROL Bike

CAROL bike calories burned CAROL bike discount

 

CAROL bike Rapid glycogen depletion

Survival of the fittest

The ‘fight or flight’ response is triggered by CAROL’s short maximal intensity sprints. This evolutionary

signal warns your body that in order to survive, it must adapt and become fitter and stronger.

Your muscles are forced to consume muscular glycogen – your body’s emergency energy reserve, which

is sugar stored in the muscle – as fuel due to the rapid demand for energy. Glycogen depletion boosts aerobic

capacity, resulting in increased fitness.

Two 20-second sprints by CAROL decrease glycogen reserves by 25-30%. You’d have to run for 45-60 minutes

to reach that level of fitness. CAROL AI bike is the simplest and quickest approach to drain glycogen and become fitter,

leaner, and healthier.

 

CAROL bike Results confirmed by research

ACE study-Get twice the gains of regular exercise

Over the course of eight weeks, 32 individuals were divided into two groups to assess the effectiveness

of CAROL’s workouts and compare them to current government exercise guidelines.CAROL’s eight-week

approach can lower your metabolic health risks by 62% and double your gains in all health and fitness

indicators.

A peer-reviewed study published by the American Council on Exercise (ACE) confirmed CAROL’s greater

results over typical exercise regimens .

You can get the following benefits by using CAROL bike for just eight minutes 40 seconds three times a week

for eight weeks:

– The risk of metabolic illness (MetS Z-Score) was lowered by 62%.
– A 12 percent boost in heart and lung fitness
– A 5% reduction in blood pressure
– Triglycerides (a type of fat found in the blood) were lowered by 10%.
– HDL (good cholesterol) increased by 6%.
– A 2% reduction in blood sugar

You’ll burn twice as many calories on CAROL bike for every minute you spend exercising than

you would with traditional workout. Because CAROL’s “after burn” burns twice as many calories after

your workout as it does during it, you’ll burn twice as many calories.

Improved insulin sensitivity, which helps you become metabolically flexible and access and burn

your body’s fat stores, has also been found to assist you in studies.

As a result, your rider’s high will endure long after you’ve completed your workout.

Try the world’s first AI-Powered Exercise Bike at CAROL!

Get Free Delivery in the US on your CAROL Bike!

 

Experiment with the BBC for 5 Weeks

 

Over the course of five weeks, six participants in a real-world work context use CAROL and track

their health development.

Research papers

How much is the CAROL bike? 

The Carol Bike price costs almost the same as a Peloton at $2,395, but it’s not designed to mimic a group

training experience or entertain you. Instead, it’s all about getting through your workout as quickly as possible.

You could get a Carol bike discount for $1,995 with our partner program

 CAROL Bike

What makes CAROL bike unique?Why CAROL Is Better Than Peloton?

Get Free Delivery in the UK on your CAROL Bike!

Carol exercise bike review – delivers the same cardio benefit of a 45-minute run in an 8-minute ride

CAROL bike review – Using the CAR.O.L Bike

The Carol Bike is quite simple to use. You’ll need to register an account when you first get started, and you

may have one for each person in your house. Because there is no extra charge for this, unlike other models

that need a subscription-based payment plan, the Carol actually compares well in terms of long-term and

ongoing expenses.

You will be guided through an initial calibration session when you first use the device, and there are a total of

six of these sessions. Ours grew increasingly difficult, with only two 10-second sprints in the first couple of

sessions and two 20-second sprints in the next four. 

This becomes the standard for your workouts, and the resistance and torque settings are monitored as a baseline

from this first six-session calibration, which is then changed as you work out over time.

There is a step-by-step instruction handbook as well as video tutorials available for setting up the CAR.O.L bike.

If you get stuck at any point throughout the assembly, there is a superb customer support team on hand to help you

out. Because you will require an Internet connection to set up the bike, the customer care staff may also assist you with

any setup difficulties you may have.

The CAR.O.L. is also very heavy to move about, weighing 59kg (just over 9 stone), and it has a maximum user weight

of 130kg (c20 stone), so it should be ideal for a wide range of users.

You’ll need to fill out some personal information during the first setup, such as your age, weight, and height.

The CAR.O.L. can personalize every exercise for optimal benefit by monitoring your biometrics in real-time and cross-referencing

the data the bike gathers with each activity.

The procedure begins with data collecting. This comprises of six introductory rides during which the bike assesses your existing

fitness and health levels in order to build a baseline, which it will then utilize to customise your development and training through

constant changes from the CAR.O.L. bike’s 1,000 resistance settings.

After you’ve finished the tutorial, you’ll be able to choose from seven distinct training modes:

  • Intense
  • Energiser
  • Constant Power
  • Fat Burn 30
  • Fat Burn 60
  • Continuous Ramp Up
  • Free Ride

5-minute REHIT workout for Intense  

  • Get out on your bike and open the CAROL app.
  • Select an intense ride.
  • A checkered flag will show on the RPM dial from 20 seconds into the warm up to one minute into the recovery period.
  • When you see the flag and feel ready, simply accelerate your pedaling to start the sprint.

Energiser

Instead of two 10-second sprints, this is a condensed version of Intense. It is meant to give your body a bit of a wakeup call, but

not completely zap the body, and is better suited for off days or to keep the body ticking along, as the name indicates.

Constant Power

Constant Power is a brilliant feature in which the CAR.O.L automatically adjusts the resistance to keep your chosen power. This is

accomplished by changing the resistance as your RPM varies. All you have to do now is keep pedaling, and the CAR.O.L. bike will handle the rest.

Fat Burn 30 and Fat Burn 60

If you want to reduce weight and burn fat, these training settings are great. A two-minute warm-up, 30 or 60 eight-second sprints

with 12 seconds rest in between each sprint, and a three-minute cool-down are included in these two exercises. This is a real beast of a workout.

Continuous Ramp Up

This training setting gradually raises power by one watt every three seconds, creating a long and grueling stamina test with the purpose of

increasing your VO2 max. As a result, to get the most out of this workout, use a portable VO2 max analyser to measure your progress.

Free Ride

If you want to travel at your own pace, Free Ride is available, similar to how traditional exercise cycles function. You may choose the level of

resistance and other objectives you want to reach before starting to cycle.

One thing I enjoy doing is keeping track of my development. This is crucial for remaining motivated and actually sticking to a fitness plan.

Every time you complete an exercise, CAR.O.L saves it so you can see how you compare to other CAR.O.L. bike users around the world on weekly

leader boards, as well as track your own progress. If you’re competitive like me, you’ll appreciate this function, which makes exercise more enjoyable.

The Peloton Digital platform is also integrated with CAR.O.L. This means you may have the best of both worlds in terms of furious solitary rides that incorporate all of the advantages of HIIT workouts, as well as classic free riding where you can participate in Peloton’s online courses.

It should be mentioned that in order to use this function, you’ll need a paid Peloton Digital subscription, so keep that in mind if this is something that interests you.

CAROL bike Reviews

CAROL bike get Excellent Score 4.7 out of 5 at trustpilot.com

“CAROL is now one of our friends. My wife was first skeptical but has now changed her mind. RE-HIIT is the

perfect workout for me, and I can truly feel the difference. It’s simple to assess your aerobic fitness as an ardent

surfer, especially after a break due to travel or low surf.

We utilized CAROL at our regular property for 2-3 months before deciding to purchase another one for our holiday

home, where we spend for three weeks at a stretch, which is far too long to be without our beloved CAROL.

I should add remark that the CAROL staff is really responsive to inquiries. Continue your excellent job.”


“Aside from being pleased with the purchase and shipping processes, as well as just riding the bike and thoroughly

enjoying the experience, I recently encountered a problem with my bike, and customer assistance was extremely

prompt and helpful in resolving the issue. It increased my trust in the bike’s quality and the structure behind it.”

“I am really delighted with the shipping and the product, however the price for tax and customs is still approximately 30 euros.”

“I’ve had my bike for a little over a week and have had nothing but positive experiences with Carol Bike and their employees.

“The customer service is among the greatest I’ve ever encountered. They have been timely, courteous, and thorough in assisting

with shipping tracking and other queries. Given my unique goals, I met with a Carol Bike fitness counselor via video for a rapid plan of action.

I was apprehensive about purchasing the bike because I don’t do much exercise. I was worried that if I spent the money, it would go unused, but I’ve used it virtually every day so far. The intensive and fat-burning rides may be completed fast, and the calendar on the display monitors and displays my progress. I believe I’ve finally discovered something that works with my schedule!My carpal tunnel syndrome flares up even on shorter rides, so I ordered the chest heart rate monitor, and now I can free my hands up throughout the warm-up and cool-down phases of the rides, which helps a lot.”

“We purchased a Carol Bike for our 12-person workplace. We devised a scheme to encourage them to ride their bikes three times each week. The feedback has been overwhelming! The majority of employees are doing it and are looking forward to it.

Personally, I enjoy it. I appreciate being able to watch my performance metrics and knowing that I can get a strong cardio exercise in only a few minutes.”

Verdict

In terms of the outcomes and benefits it may provide, this is a one-of-a-kind bike. There are other HIIT-style training bikes out there that will give you similar benefits if you’re prepared to put in the additional effort, but the CAROL bike is the best in this category.

In terms of riding experience, build quality, training functions, and overall gym quality in the comfort of your own home, the CAR.O.L. bike is outstanding.

Anyone who wants to enhance their fitness and health without having to spend hours in the gym should consider the CAR.O.L. cycle.

If you try it and don’t like it, you’ve always got peace of mind with the CAROL 30-day return policy.

Get $400 off in Spring Sale – limited time offer

Get Free Delivery in the US on your CAROL Bike! Get Free Delivery in the UK on your CAROL Bike!

FAQ

Does the CAROL bike really work?

Yes, in my opinion. The 40-seconds-in-Hell workout is an excellent addition to a healthy lifestyle,

particularly if you don’t have the time to conduct more strenuous exercise.

What is a carol bike, and how do you get one?

CAROL is a stationary reduced effort high-intensity interval training (REHIT) bike that uses artificial

intelligence to increase your cardiovascular and cardiorespiratory fitness.

Is it possible to lose weight while riding a stationary CAROL bike?

There are two fat-burning training regimens on the Carol Bike Weight Loss. CAROL bike calories burned

even tracks in free riding mode.

The ‘after burn’ method of CAROL burns more calories after you get off the bike than it does when you’re riding.

Insulin sensitivity improvements help you become more metabolically versatile and efficient at burning

fat for energy.

What’s the best way to set up a carol bike?

Putting together your CAR. O.L bike 

  • Take your CAROL bike out of the box.
  • Using the screws and tools provided, secure the front and rear floor stabilisers.
  • Attach the saddle to the seat post by sliding it into the frame.
  • Slide the console into the bike frame neck after connecting the console cables to the bike frame.

Is it possible to lose weight by riding an exercise bike?

Riding a stationary exercise bike is a great way to lose weight and burn calories while also improving your

heart, lungs, and muscles.A stationary bicycle puts less stress on your joints than other types of cardio equipment,

but it still gives a terrific aerobic workout.

A stationary bike workout can burn more than 600 calories each hour, depending on the intensity of your

workout and your body weight. As a result, indoor cycling is a fantastic calorie-burning training alternative. The secret

to losing weight is to burn more calories than you ingest.

What is the best exercise bike?

 

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