BioHIIT: Reduced Exertion HIIT (REHIT) and AI-personalization make our CAROL Bike a most powerful training stimulus

Our CAROL Bike was developed with leading exercise researchers to deliver the shortest, most effective workouts. Our signature BioHIIT workout creates the most potent training stimulus with just 2×20-second sprints. It’s scientifically proven to deliver superior health and fitness benefits compared to regular cardio exercise—in 90% less time.

In the past 2 weeks, my VO2max has gone up 5% already.

Dave Asprey, Biohacking Founder

I’ve never experienced a workout as efficient as what this bike offers.”

Steven John, Business Insider

CAROL helps me to be a better CrossFit athlete by improving my VO2max and aerobic capacity.”

Michael Kummer, Crossfit Athlete