Reduced Exertion HIIT (REHIT) was developed by scientists looking for the shortest, most effective and accessible way to exercise.
REHIT 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 normal exercise—in 90% less time.
CAROL’s AI-personalization and Instant Resistance help you push to your limits during the sprints. Like in a ‘fight or flight’ situation, your muscles are forced to mobilize about 25-30% of muscular glycogen—your emergency energy reserve—which releases key signaling molecules (AMPK and PGC-1a), telling your body to get fitter and stronger.
You develop more mitochondria, your blood plasma volume increases, and your heart gets stronger. Resulting in increased aerobic capacity.
Previously REHIT was only possible in a lab setting. But we teamed up with the world’s leading exercise researchers to get REHIT into the real world. And 40 prototypes later, CAROL Bike—the world’s only home REHIT exercise bike—was launched.