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

A few months ago, after years of hearing many rumors about CrossFit — that it changes your life, that it's incredibly hard, that it's caused more than a few muscles to be ripped from bone — I finally ...

Hate it or love it, people have strong opinions about CrossFit. Devotees tout it as the best way to transform your body, while critics say there's no surer way to end up injured. Regardless, there's ...

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 ...

Toetzke wants to introduce the standardized mass appeal of Hyrox, where every event follows the same format, to the estimated four million fitness fans who practice CrossFit in gy ...

Add Yahoo as a preferred source to see more of our stories on Google. Few fitness trends have experienced as meteoritic a rise in as short a period of time as has CrossFit. First entering the scene ...

Before Seth Rollins was christened "CrossFit Jesus," the man who now can snatch more than 250 pounds didn't even know how to squat properly. "I understood the mechanics -- You put a bar on your back, ...

CrossFit is a global phenomenon: 12,000 locations, hundreds of thousands of diehards, and a full-body workout that can make you look like a superhero, 60 Minutes said on Sunday. "In just 15 years, the ...

While Pilates focuses on flexibility and controlled movement to build core strength, CrossFit emphasizes intensity and ...

Obi Vincent is joined by Zac Perna for a CrossFit session. The video follows Zac as he works through the workout.

If you're ready to take your strength workouts to the next level and shock your muscles (in a good way of course), CrossFit might be exactly what you need. This training style is quick, intense, and ...