"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." You’ve probably heard of high intensity interval training (a.k.a. HIIT), but have you heard of high ...

If you’re new to HIIT you may be wondering if it's safe for you. The truth is, high-intensity exercise can be a great addition to everyone's workout routine, it's the impact level of the exercises you ...

Add Yahoo as a preferred source to see more of our stories on Google. Couple power walking outside in the park on a cold day. (Getty Images) This month we will be alternating between HIIT walks and a ...

In a recent study published in the Journal of Bone and Mineral Research, researchers assessed the impact of high-impact exercise on femoral neck bone density and knee osteoarthritis (OA) (a ...