Your results, supported by science.
Improve your cardio by 12% in just 8 weeks.
1 min read
Improving your VO2max by 12% is like turning your body clock back 10 years.
Reduce your risk of type 2 diabetes by 62%—and blood pressure by 5%.
Reduced Exertion HIIT (REHIT) is the most effective cardio workout ever.
2 min read
You’ll burn more calories on a 15-minute CAROL ride, than a 30-minute run.
CAROL Bike’s Reduced Exertion HIIT (REHIT) workout. Increase VO2max. Live younger.
REHIT: The shortest, most effective workout. Backed by science.
3 min read
The shortest, most effective cardio workout just got even shorter.
4 min read
CAROL Bike and muscle glycogen: the facts
How CAROL Bike’s short, effective workouts deplete muscle glycogen—and improve aerobic capacity.
From maximizing calorie burn to sprint duration—get more from your cardio.
Elliptical vs. stationary bike: which is a better workout?
The benefits of these low-impact cardio workouts depend on effort.
8 min read
Exercise bike vs. treadmill: which one offers a better workout?
The intensity and duration you can maintain longest determines results.
10 min read
CAROL CEO and co-founder, Ulrich Dempfle, unpacks CAROL's science.
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