I was sleeping in peacefully when around 6:45 I wake up all of a sudden. I just move my left leg slightly, and out of nowhere, my calf just cramps up like crazy. Now my calf is sore, and I walk funny. That happened this morning, but everyday, I would wake up at some hour of the night, and my toes would be curled, and the arch of my foot would cramp. How do you keep this stuff from happening in the first place?