This exclusive excerpt from ‘The Glass Box’ documents the early days of CrossFit—and its conflicts.

CrossFit is like cycle syncing and the Cloud: Most people have heard of it, but few people actually understand what it is. But unlike the IRL versions of these moves, in CrossFit, they are ...

Anyone is free to do CrossFit. The company puts instructions and videos up for free on its website, and posts a workout of the day, or “WOD,” right on the homepage. (CrossFit’s over 6,000 affiliate ...

Greg Glassman, inventor of the CrossFit fitness system, at an affiliate gym in New York City.. Andrew Hetherington On that spring day across America, the CrossFit faithful gathered–and toiled. There ...

Over the past few years, CrossFit has become something of a toxic brand. But for the 60% of members who are women, CrossFit is often a vital part of their wellbeing regime, as Alice Porter has been ...