Whether through marathon training or simply getting my steps in, I've spent a lot of this year on the treadmill. My hips, knees, and ankles are feeling it, and my body feels tired. But I enjoy the ...

Most gyms have an elliptical machine, otherwise known as a cross trainer. And chances are, someone's on it—and using it incorrectly. Sounds good, right? Ahead, fitness experts weigh in on everything ...