does anyone else get cramps while they're surfing? I usually get them on my hamstrings after a while (2-3) hours nonstop water time. Also, when the waters a little chilly and i'm not wearing a wetsuit or the waters cold and i'm only wearing a spring suit, my arms get sore really fast. I'm very active (I swim 2-4 miles a day nov.-march) so I don't know whats causing these.
Yeah, I have gotten them in my calves after a couple of hours out in cold water. Especially if there are lulls. Gotta try to stay warm and loose. Like the previous people have said - force yourself to take a break and hydrate! I stretch before, during and after as well. Maybe some windmills for your arms to keep the blood in them.