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 ...

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 ...

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 ...

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, ...

This January, as part of our 28-day ReNew Year Movement Program, Ashley Joi is helping you build strength and mobility and have fun doing it. Today, the workout of choice is HIIT: high-intensity ...

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 ...

The sweat leaking from my forehead is so intense my eyes sting. My body has that delicious buzz of endorphins zipping through it and my limbs are fully awake, even though it’s only 7am. I flop back ...

A new study suggests that HIIT workouts may help preserve lean mass in older adults compared to moderate exercise—but changes ...