Participation in once-popular HIIT workouts is flagging. But experts say it’s still one of the best types of exercise you can do.

New evidence shows that short, intense HIIT workouts can deliver big health benefits for obese teens, improving fitness, blood pressure, and cholesterol, even if the scale doesn’t change. Study: The ...

REHIT is also ideal for people who are experiencing a weight-loss plateau, Mansour says. If you do a lot of high-intensity workouts without much rest, you're likely taxing your body more than you need ...