Science Apr 4, 2023

Time to thrive

Make the most of your time and fit more into your life with CAROL Bike's short and efficient REHIT workouts.

Time to thrive

Lack of time is the number one reason why most of us don’t exercise enough. Reduced Exertion HIIT (REHIT) was developed by scientists in search of the shortest, most effective method to exercise to overcome this barrier.

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—requiring only 15 minutes instead of 2.5 hours per week, recommended in government guidelines.

With just 3×5-minute workouts per week, REHIT on CAROL has been shown to improve your cardiorespiratory fitness (VO2max) by 12% and reduce your risk of developing metabolic diseases by 62% in only 8 weeks.

Weekly cardio, two ways

What the week actually costs you

15 mina week — 3 × 5-minute workouts, and the fitness and health markers still move.
150 mina week of moderate activity, the standard recommendation REHIT is measured against.
2 hrs 15given back every week — the reason lack of time stops being the reason.

Same eight weeks, same measured outcomes: VO2max up 12%, metabolic disease risk down 62%.

Reclaim your health and fitness, transform your body, and turn the clock back on aging with CAROL Bike—making every moment mean more.

Spend less time on cardio—and more time on the things you love. Discover how CAROL gives you back your time to thrive.

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How Long Does It Take to Improve Your VO₂max?

Four to six weeks to the first measurable gain, and 12-15% from two 20-second sprints.

Best Time to Exercise: What the Evidence Actually Says

Afternoon sessions help blood sugar. For fitness, the hour matters far less than the habit.

Make every second count.

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