This may sound a little off beat but it works amazingly well for me. I tend to get foot toe and calf cramping. I've got control for now but it can be touch and go. I have a routine that includes several things including my tens machine but here's a little low tech device that can stop foot and leg cramping fast. Like I said it works for me anyway. It's those silicone toe separators that you put on your toes to spread them apart. It's worked like a charm every time I've used it. They say you shouldn't sleep with it on or for more than an hour at a time but I'm not sure why. I've had it on for more than an hour on several occasions without negative effects.