Ideal sources for Wikipedia's health content are defined in the guideline Wikipedia:Identifying reliable sources (medicine) and are typically review articles. Here are links to possibly useful sources of information about Exercise-associated muscle cramps.
I'm not convinced that muscle cramps "require medical attention". It seems to me that most people do just fine with self-care. However, I can't find the sources quickly, so I'm not sure what was supposed to be said. Perhaps they say something like cramps are a common chief complaint at the medical tent during triathlons, or something like that? WhatamIdoing (talk) 22:55, 29 June 2014 (UTC)[reply]
Dubious claims like these can be removed if they are unsourced, so I have gone ahead and removed it.TypingAway (talk) 04:31, 23 April 2015 (UTC)[reply]