The 6 Most Brutal CrossFit WODs

This workout does a good job conveying the basics, and the madness, of CrossFit. This WOD gets to a lot of people at the knees to elbows stage, according to Sara Haley, star of Sweat Unlimited, a DVD series of extreme five-minute workouts. 
“[The Filthy 50] is such a challenge because you have to literally be good at everything. It’s a full-body workout that includes cardio.”