"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 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 ...

For years, doctors have cited swimming and running as two of the best ways to strengthen your muscles and improve cardiovascular health. But now, new research says that racket-based sports like tennis ...

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?” ...

The first-ever Swimrun competition in Colorado — with athletes alternately swimming and running — arrives at Horsetooth Reservoir on Oct. 5 ...