If there's one way to get yourself out of a fitness rut, it's running up a hill. These natural obstacles are a great way to challenge your muscles and boost your cardio fitness, but you don't need a ...

Here’s an example. Running an ultra marathon requires endurance, because the goal is to maintain a steady pace for several ...

If you enjoy sprinting, there’s great news: even short bursts of high-intensity sprinting can deliver powerful benefits for your body and brain, especially for women. New research continues to show ...

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 hard interval workout, and I’ll explain exactly how. But I also need to ...

As HIIT's popularity soars, sprint interval training, or SIT, is doing its best to catch up. Can shorter, harder, faster deliver better results? As the popularity of HIIT continues to soar, sprint ...

It’s no secret that weight loss can feel like an uphill battle, but along with following a healthy meal plan geared for weight loss, exercise propels you toward your goal, too—and it can help you feel ...

There’s a common misconception that sprinting and burpees are the best forms of exercise for fat loss. While the statement ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Losing weight and gaining muscle are two major feats in and of themselves, but if your goal is to achieve ...