Experts share the best types of interval training to help you improve both as a long-distance runner and an all-around athlete.

Eight weeks of HIIT increases both the number and efficiency of muscle mitochondria by expanding their energy-producing inner membranes.

The fitness boot camp craze is evolving. It's no longer just the crack-of-dawn, sergeant-led calisthenics classes. Mommy Bootie Camp in Kensington, Md., packs a lot of punch, with a focus on interval ...

Some types of exercises, like HIIT and strength training, can help you lose more belly fat. Staying in a calorie deficit is necessary for losing belly fat.

Talk about the winter that wasn’t! Our weather was certainly perfect for the golf tournament, but we are 15 to 20 degrees hotter than we should be. I don’t know ...

RUNNERS CAN EASILY fall into a basic routine for their workouts: Lace up, hit the pavement, then cruise at a comfortable pace for as many miles as planned. This might feel good, but it’s not always ...

A typical Tabata workout consists of 8 rounds of 20 seconds of maximum effort exercise followed by 10 seconds of rest. This ...

A new study suggests that HIIT workouts may help preserve lean mass in older adults compared to moderate exercise—but changes were small. Here's what to know.

Want an exercise program that helps you work out smarter, not harder? You've found it. The Women's Health+ Ultimate HIIT Challenge is a week-long program that combines high intensity interval training ...