I had terrible cramps in my calves last night, which I had never experienced before. They were on the front of my calves. The only thing I can think of that may have caused this was during the day yesterday I rode with the saddle a little too high, high enough so that I mostly used the front of my soles to pedal (whcih seem to stretch the front muscles of the calves). Just wonder if others had the same happen to them to confirm my conjecture...