Swimmer's muscle cramps.

AS a young physician, I was sternly taught never to submit any paper for publication that contained theory unsubstantiated by fact. Now that I have reached a riper age — indeed, one that approaches medical senility — I am wondering if the Journal's new section entitled "Medical Intelligence" may not offer me an outlet for some of those wonderful theories I was never able, or was ever too lazy, to substantiate by experiment. At any rate, here goes: Possibly, after all, there was something in the old admonition not to go swimming after violent exercise. Perhaps many a healthy young . . .