WTF is wrong with my leg muscles? I can make my foot muscles under my arch, knot up on demand by straightening my leg, pointing my toes and flexing the muscles. But that's not the worst of it. I went swimming today (after my 10 mile commute home) while my daughter was in swim class, and half way thorough my 1st length of the pool, my left calf muscle twisted up so bad I had to stop. I finished that length and the one back, doing the breast stroke. My calf still feels a bit sore, 2 hours later. Ever since then, I've been trying to stretch my calf muscle. And actually, this also happened last summer, when I did the exact same thing. I swam 4 days in a row, and it happened every time, but not so bad that I couldn't continue (HTFU worked last year, but not today) Why is this happening? Anything I can do to stop it?