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 ...

Want to make the most of your HIIT workout? Here’s how to nail the perfect circuit, according to Strong Women ambassadors Emma Obayuvana and Caroline Bragg. Most of us are still working from ...

But I also need to clear up this silly question about whether it’s “better than” HIIT (or high-intensity interval training). SIT is, in fact, a type of HIIT. Sprint interval training refers ...