Scientifically-proven to get you fitter, faster.

Massive calorie-burn during your workouts and after—thanks to the effects of afterburn. Scientifically-proven to help you lose 9x more fat than regular exercise.

A short warm up, then 30x 8-second sprints at maximum intensity, with a 12-second recovery between each one. And a final 3-minute cool down at very low intensity.

A short warm up, then 45x 8-second sprints at maximum intensity, with a 12-second recovery between each one. And a final 3-minute cool down at very low intensity.

A short warm up, then 60x 8-second sprints at maximum intensity, with a 12-second recovery between each one. And a final 3-minute cool down at very low intensity.

Control timing and intensity, adjust your resistance and target power levels—compatible with a range of other fitness and entertainment apps like Peloton Digital, YouTube, Netflix or Zwift on a different device—so you can workout your own way.

Lets you control timing and intensity, like a regular exercise bike. You can control resistance with the slider at the bottom of the screen.

Set the power at the bottom of the screen and your CAROL Bike automatically adjusts the resistance—to keep you at your target power throughout the workout.

Target Power Free Ride also allows you to sync up with popular apps like Peloton Digital, YouTube, Netflix—or Zwift on a secondary device.

Control the timing and intensity of your workout to train in your AI-personalized power and heart rate zones. Here’s how:

• Set resistance or target power zone using the slider at the bottom of the screen
• Press the WATT button and choose your target power zone

To make sure the AI can properly measure your Functional Threshold Power (FTP) and learn where your power zones are, just try one of CAROL Bike’s Aerobic Fitness Tests—in the Fitness Tests section.

Similar cardio fitness and metabolic health benefits to REHIT Intense.

With this workout, you’ll sprint for longer (60 vs. 40-seconds) but each sprint is shorter (6 vs. 20-seconds). Here’s how it works:

A short warm up, then 10x 6-seconds sprints at maximum intensity, with up to 1-minute recovery between each sprint. And a 3-minute cool down at very low intensity.

This workout’s the result of extensive scientific research and is proven to be tougher than REHIT Intense. 60-seconds of all-out sprinting, with warm up, recovery and cool down at a much higher load of 50 watts vs. 20 watts with REHIT Intense. Here’s how it works:

A short warm up, then 3x 20-second sprints at maximum intensity, with a 2-minute recovery between each sprint. And a final 3-minute cool down.

With a sprint duration that’s higher than REHIT Intense (120 vs. 40 seconds) this is one of CAROL Bike’s toughest workouts. Here’s how it works:

A short warm up, then 30x 4-second sprints at maximum intensity, with up to 30-second recovery between each sprint. And a 3-minute cool down to finish.

A range of workouts that measure your Functional Threshold Power (FTP), Maximum Aerobic Power (MAP) and V0₂max—to accurately calculate your Fitness Score.

After a 2-minute warm up, CAROL Bike’s AI automatically increases your target power throughout the ride. Keep pushing as long as you can, and go to your absolute limit—so the AI gets an accurate measurement of your aerobic performance level.

It’s super challenging, but choose a ramp-up speed that ensures your test lasts between 7 and 15 minutes. This gives the AI the best chance to properly measure your FTP.

The idea here is to set a resistance and target power level at the bottom of the screen—so you can pedal at full power for the full 20 minutes.

The LAP button lets you keep an eye on your average power on each lap. And when you’re finished CAROL Bike’s AI calculates your FTP as 95% of your best 20-minute average power level.

This is a different way to measure your FTP, by setting a resistance and target power level that you can sustain at full power for 2x 8-minute rides—with a 10-minute recovery period in between.

As with the previous test, you can set your levels at the bottom of the screen. While the LAP button lets you keep an eye on your average power on each lap.

And when you’re finished CAROL Bike’s AI calculates your FTP as 90% of your 2 best 8-minute average power levels.