Personally, when I think of Crossfit, I think of injury. As a teenager, I did heavy training for martial arts and I got hurt. My teachers would train weightlifters from the gym next door for a few weeks and then have me spare with them. The last guy I fought had 85 lbs. on me at the time and he was actively trying to injure me (he succeeded). I should have been hurt more often than I was, but I was lucky. Crossfit reminds of that same sort of mentality where they encourage people to push forward without regard to their body.