Imagine driving a car and constantly switching between the gas pedal and brake. You waste a lot of fuel, which is a great way to slim down. And unlike steady exercise, which mostly builds endurance, ...

You've likely heard all about the benefits of exercise for your heart, lungs and blood sugar. Basically, it does the whole body—and mind (thanks, endorphins!) good. However, you may have stopped using ...

If cardio seems more like a chore and less like a fun sweat session, this 10-minute HIIT workout can help you switch it up. Presented by Allegra, this high-energy routine is a quick way to get your ...

Get ready to up the ante with a fun-filled outdoor HIIT session, presented by Allegra. Hosted by Class Fitsugar trainer Jenna Willis, and assisted by Nikki Keeshin and Paris Nicole, this HIIT workout ...

If you’re looking to add some kick to your workout and save time while doing it, it’s probably time to try a 15-minute HIIT workout. “HIIT, or high-intensity interval training, essentially means you ...

HIIT workout founded by a Japanese Olympic coach that uses periods of intense exercise and rest to burn calories.

Kaley Cuoco knew her postpartum workout journey would begin with small steps. So she embraced her treadmill. “Putting that incline up is so good for your muscles, and for your circulation,” Cuoco, 37, ...

One 2016 study found that the 4x4 method was better at boosting the metric than a 10x1 HIIT workout (one that consists of 10 sets of one-minute work intervals)—a finding attributed to the enhanced ...