If you are preparing for military service that involves intense physical training, you will want to be a cardio machine. Here are three standard methods of movement in the military: running, rucking ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Everywhere you look, someone (like me) is raving about walking on an under-desk treadmill or is marathon ...

Sign up for CNN’s Fitness, But Better newsletter series. Our seven-part guide will help you ease into a healthy routine, backed by experts. After many years of ...

Cycling and running both improve fitness. Learn how they compare to decide which fits your goals and lifestyle best.

What happens when lifelong running meets aging, adaptation, and joy? One marathoner shares how slowing down revealed a deeper ...

Get ready to go that extra 2,640 feet. After months of rumors, the Air Force confirmed on Wednesday that a new service-wide physical fitness test will include a 2-mile timed run. The service also said ...