"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Both running and swimming are great forms of cardio, engaging your muscles, boosting heart health, ...

Climbing, skiing and paddleboarding also feature in our round-up of this year’s charity challenges ...

TAKE AN OLYMPIC swimmer and Olympic runner and stand them next to each other, and there’s no doubt both will look super fit. They’ll both also have excellent cardiovascular conditioning. “You often ...

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 ...

On the surface, running and swimming seem about as compatible as chalk and cheese. The former is dry, vertical and performed ...