Sprint interval training, or SIT, is super trendy right now. It’s a great way to improve your running speed and to get in a ...

But to get the benefits of HIIT, you need to be ready to work hard. A true HIIT session involves short bursts of intense exercise, pushing your heart rate to 80 percent of your maximum in a short time ...

One of the most popular benefits of HIIT is the “after-burn effect.” This type of exercise stokes the metabolism, increasing calorie burn during the workout — and it stays elevated after the ...

Jumping out of bed and straight into a HIIT workout without food first could be a problem for performance and hormonal health. HIIT requires huge amounts of energy to get through powerful moves as ...

Pushing your body to its limits is the latest workout trend – here’s how to sprint safely. As the name suggests, it involves intervals of work and rest. “SIT is a derivative of HIIT ...

In a five-year Norwegian study looking at 1500 adults, participants were placed into three groups: HIIT, moderate exercise and following the government’s activity guidelines. Those in the HIIT ...

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 ...