I was flipping through Fangoria over the weekend and there was an interview with Derek Mears, the actor/stuntman playing Jason in the Friday the 13th remake.
In the interview, Mears said:
“The new Jason is more functional than bulky, kind of a leaner model, so I said all right and started doing what’s called cross-fit training, so I’d look like a guy who got fit from living in the woods.”
See guys, whether you want to look like a Spartan warrior or a homicidal maniac, Crossfit can get you there. 
In any case, I’m still seeing this when it comes out.
