"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, ...

Why this full-body water routine is becoming America’s favorite way to build strength, boost cardio, and protect your joints.

Move over, cycling and running. There’s another way to get your cardio in: swimming. We get it—getting yourself to a pool and strapping on your goggles might feel like a lot of extra effort—but ...

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The sport, formerly known as synchronized swimming, has a new name as well as more muscular athletes and more risky tricks. At a minimum, it demands endurance, power, leonine grace, hair gelatin, ...