REHIT Cardio

CAROL Bike

A full cardio workout in minutes. Short, intense sprints with AI-set resistance deliver the cardiovascular benefits of a long session in a fraction of the time.

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Why it works

Complete cardio session in about 5 minutes
AI-personalized resistance for any fitness level
Reduced Exertion HIIT (REHIT) science
Measurable cardio fitness gains in weeks

The science

REHIT triggers the same cellular signaling as longer endurance work with just two 20-second sprints — studies show meaningful VO2 improvements in as little as 8 weeks.