"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, ...

When candidates are training for the Navy physical screening test (PST) for SEAL, EOD, diver, SWCC and air rescue jobs, they typically find improvements in running and swimming the toughest to achieve ...

Depending on the athletic history of a military recruit, the process of preparing may be different from one person to the next. Endurance athletes tend to do well on calisthenics and cardio fitness ...

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 ...

When a technological breakthrough gives some athletes a major advantage, how should we think about the victories, the medals, the world records? Is new technology unfair? Is it cool? Does it matter ...

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

Four friends are sitting around a bar in Sweden, sharing a few drinks and catching up. One turns to another and says, “Do you think we can swim and run 75 kilometers up the coastline of Stockholm?” ...