CEO of CAROL, Ulrich Dempfle, discusses how their AI-powered exercise bikes can improve fitness in just 5 minutes a day. He delves into the science of REHIT training and its impact on cardiovascular fitness, debunking the myth that longer workouts are necessary for significant results.
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insights INSIGHT
REHIT vs. HIIT
REHIT uses two 20-second sprints at maximum intensity, a much shorter workout than HIIT.
This brief, intense effort triggers the body's fight-or-flight response, leading to significant fitness gains.
insights INSIGHT
Science of REHIT
During the sprints, the body uses phosphocreatine for immediate energy and then muscle glycogen.
The mobilization of glycogen releases molecules that signal the body to adapt and get stronger.
insights INSIGHT
Recovery's Role
Fitness gains don't happen during the workout itself, but in the recovery period between workouts.
The workout acts as a trigger, sending a signal to the body to build muscle and improve fitness.
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When you hear how short Ulrich Dempfle’s workouts are, you might think he’s not doing enough…
Ulrich is the co-founder and CEO of CAROL, a company that makes AI-powered exercise bikes designed to make you as fit as possible in as little time as possible. And when they say as little time as possible, they’re not joking - their workouts are less than nine minutes long!
And somehow, in just five minutes a day, a few days a week, Ulrich has seen his cardiovascular fitness skyrocket him from the 50th percentile for his age, to the top 5 percent. He knows what you’re thinking, too - it sounds too good to be true.
That is, until you hear the science behind it.
Ulrich goes deep on the science behind “reduced exertion high intensity interval” training, or REHIT, and how it aligns with what we already know about exercise science.
How I Work 