Re: How hard do you have to work to get Rhabdo?
I'd propose GHD situps, and jumping pullups as big risk factors.
I think a lot of people here are focusing on the wrong thing. Someone correct me if I'm wrong here, but I believe the rhabo seen in Crossfit is generally due to excessive muscle damage (i.e. grinding out failed reps, negatives, etc.. ) more so than intensity per se.
** Doing "Fight Gone Bad" until you puke - probably lower risk. Impact is spread out over most of the body, and the exercises are fairly low weight. Failure tends to be metabolic rather than muscular. The only thing keeping this from being a REALLY bad one is that the exercises in it doesn't focus on the negatives.
** Doing "Linda" as Rxed, when not strong enough, higher risk: Grinding out endless heavy deadlifts and cleans. Stopping on failure only long enough to do one or two more.
** Doing circuits of GDH situps and back entensions:
Put my GF in the hospital on IV fluids for two days. Four months later her core musculature has STILL not recovered.