Quote Originally Posted by zencentury View Post
It would seem to me that cramping can be life threatening. After all, the heart is a muscle too.
Well, to swimmers it is life-threatening, as the story pointed out, and also to anyone who suffers a particularly severe cramp while in traffic. But if there were any connection between heart rhythm disorders and skeletal muscle cramps, I can't imagine someone wouldn't have noticed it by now.

I'm still fixating on the idea of a quad cramp, though. I've had the usual calf, hamstring, foot and toe cramps of course, and the story only mentions the large posterior leg muscles. Quick survey: how many of y'all have ever had a cramp in a quad? Tibialis anterior? Dorsal foot muscles?