Influencers call sprinting the ultimate fat-burning workout. Experts say it’s more nuanced—but research shows this high-intensity exercise offers surprising benefits for the heart, muscles, and even ...

There’s a lot of talk in the exercise world about high intensity interval training (HIIT) lately, which is exactly what it sounds like — alternating episodes of exercise with periods of less intensive ...

High-intensity interval training is one of the best ways to pack a lot of exercise into a short period of time. HIIT workouts are so efficient because they alternate short bursts of very intense ...