About CAROL Bike ai powered cardio

CAROL Bike AI Cardio

Introducing Reduced Exertion HIIT

Developed by leading scientists, Reduced Exertion HIIT (REHIT) is designed to provide the shortest, most efficient exercise 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.

Your results, backed by science

CAROL Bike is scientifically researched and proven to improve your fitness and health. Just 3x5-minute REHIT rides a week will improve your cardio fitness by 12% in just 8 weeks.

Optimized for maximum effectiveness and safety

CAROL Bike offers all essential features to make REHIT easy, effective and safe. All components have been meticulously engineered to provide the optimal riding experience.

Intelligent design, explained

CAROL Bike is the only bike fully optimized for Reduced Exertion HIIT (REHIT) - making it simple, effective, and safe. It provides the shortest, most efficient workouts suitable for any age and fitness level - while offering greater versatility and choice than most other smart bikes.

Unlock the key to longevity

Learn how increasing your VO2max can help you live longer, healthier, and better in our free guide for enhancing longevity.

A simple habit… that works

Just 2x20-second sprints, 3x a week. Scientifically-proven to be the most efficient cardio workout—a moment of effort you can always master.