Named the top fitness trend for 2018, HIIT involves going hard for, say, 30 seconds, then easy, hard, then easy, and so on—as ...

With the thrill of New Year’s resolutions behind us and a long winter ahead, it can be hard to keep going with workout goals. But sometimes, all you need is the right song to give you the push you ...

Usain Bolt smashed the 100-metre sprint record at the 2009 World Championships in Athletics in Berlin in a floodlit stadium under an inky night sky. This article is part of a series on fitness that ...