CAROL Bike
CAROL Bike
AI-driven indoor bike that calibrates per session to your own VO₂max curve. The REHIT protocol — two 20-second all-out sprints inside an 8-minute ride — has the smallest effective dose of HIIT in the literature. Five minutes of actual hard work, three times a week.
Warranty
5-year frame, 2-year components
Materials
Powder-coated steel frame, composite flywheel
Verified voices
3 sources
First produced
2018
On the object
Revolutionize your fitness routine with a five-minute, AI-optimized cardio workout.
Who it's for
- Time-constrained professionals
- Fitness enthusiasts seeking efficiency
- Individuals interested in high-intensity training
Who should skip
- Casual cyclists
- Those seeking traditional workout experiences
- Users looking for extensive feature sets
The trade-off
The CAROL Bike prioritizes efficiency over variety, focusing on a short, intense workout rather than a broader range of exercises. This may not satisfy those who prefer longer, more varied cardio sessions or additional training modalities.
Specifications
Tim Ferriss·Andrew Huberman·Chris Williamson
Endorsed by
Research
- PubMedJournal of science and medicine in sport· 2019
Effects of different protocols of high intensity interval training for VO(2)max improvements in adults: A meta-analysis of randomised controlled trials.
- PubMedScandinavian journal of medicine & science in sports· 2013
Effects of sprint interval training on VO2max and aerobic exercise performance: A systematic review and meta-analysis.
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