HIIT

New research confirms it—move more, sleep better. And the harder you go, the better you’ll rest.

A 20-minute workout a day is enough to produce significant health benefits.

Enhance the efficiency of your cycling regimen with these 8 transformative HIIT cycling workouts.

Explore REHIT, the game-changing workout that redefines time-efficient training with just 2x20-second sprints.

Get fit with exercise snacking: Quick, 1-minute workouts for improved fitness and health.

HIIT provides all the benefits of regular training—in half the time.

CAROL's signature 5-minute workout, scientist approved.

Making small, incremental changes to your behavior is the most efficient way of building new fitness habits.

CAROL CEO and co-founder, Ulrich Dempfle, shares his advice on setting simple fitness habits.

Why Reduced Exertion HIIT (REHIT) is the most effective workout.