Want to tighten your butt, get more definition in your legs, sculpt your core, and improve your strength and stamina? Sprinting will help you achieve all the above. To learn the basics of sprinting ...

Sprinting builds muscle mass and strength, can increase your speed, and help tone muscles. Long-distance running may improve your cardiovascular endurance and respiratory system. Which is best depends ...

"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 ...

Scientists think there are many different factors that can influence how fast you're able to run, like your technique, psychology, what you're eating, and your anatomy. But new research has found ...

Jeff Simonitsch of San Francisco runs three times a week, lifts weights a couple more, yet it was sprinting that seemed to make the difference in his fitness game. "[I] started to do it because I ...

Losing weight and gaining muscle are two major feats in and of themselves, but if your goal is to achieve both at the same time, you’re likely working toward body recomposition. Strength training and ...