The past week or so, my calf muscles act like they want to cramp once or twice a day. This is just during normal work activity of standing and walking. Usually, I can stretch them and the feeling passes. This morning, both calves cramped at about 4 in the morning and woke me out of a sound sleep. A few minutes of pain and stretching got the knots out. I already do some light stretches before bed. Is there anything I can do to stop these cramps?

I use to get charlie horses in my calf muscles all the time. Someone told me that I might be low on potassium. Try eating more bananas and see if that helps...

I would second the potassium. Also maybe try some warm baths or heating pads (if its not so hot in the house you can't stand the thought of it).

Ditto that.

Also, are you drinking enough water/liquids?

Oddly enough, I've had more bananas this week than usual, so it seems I should more potassium that usual. I'm drinking a minimum of 85 ounces of water a day, sometimes more.

I wonder if cold temperatures might have anything to do with it? It's been cooler the past few days (after a 90 degree heat wave last week). Maybe I've been cooling down too quickly after exercise.