toe cramps

Maybe it's the cold water, and blood gets shunted away from the extremities. But I have been getting toe cramps when I first start warming up. By the end of the first main set, the lower calves get involved--twitching and borderline charlie horsing around. Sometimes, if I am racing a teammate in different sets, I have to kick with my feet at right angles to my lower legs to keep the cramps from seizing me up completely. Any tips for cramp prevention? forums.usms.org/.../banana.gif :banana: Oh, please don't suggest eating more bananas unless this really does work.