"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Most gyms have an elliptical machine. And chances are, someone's on it—and using it incorrectly. The ...

Running’s great. The fresh air, the freedom, the simplicity. You can’t beat it. But to improve as a runner, you need to do more than just run. That’s where cross-training comes in. It can help you to ...