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If you’re looking to revamp your at-home fitness lineup ahead of 2025 and don’t have hours to commit to exercising each day, allow us to introduce you to the CAROL Bike. The science-backed and AI-powered fitness bike is engineered to give you maximum results in the shortest time possible—and by the shortest time, we mean as little as five minutes. In fact, according to the brand, the CAROL bike is “proven to deliver double the health and fitness benefits in 90 percent less time compared to regular cardio.”

Not only is it a huge time-saver, but the CAROL Bike is also designed to be personalized to the rider’s individual fitness levels, goals, and preferences, making the workouts easy to follow, time-efficient, and super effective. CAROL’s AI and Reduced Exertion HIIT (REHIT) technology optimizes the workout to your ability and fitness level, so every second matters. The personalized, optimal resistance levels are automatically adjusted as you work out—at exactly the right time—making the most efficient workouts easy to follow. “CAROL Bike is designed to maximize training efficiency, with the shortest, most effective workouts, backed by science. And new rider-inspired features that give riders more flexibility to exercise their way,” says Ulrich Dempfle, CEO & Co-Founder at CAROL. You can try the CAROL Bike for yourself risk-free for 100 days, and the brand offers free shipping (7-10 business days) in the U.S.