Or when I wake in the night, at least, there's a pretty good chance it's because a calf cramp is coming on.
I'm usually a bit fuzzy and I lay there, trying to remember: which way should I move my foot? One direction will forestall or at least reduce the pain; the other will make it far worse, and the clock is ticking. Any second, the cramp will spasm and then it will be too late.
This week, I have been walking considerably more than usual, since I don't want to park my car where globs of thick, dark-colored grease will fall on it from a great height. Yesterday evening, feeling spry, I added to the total with a brisk walk down the Monon for a snack. Three times last night, incipient cramps woke me. Each time, I was just a little late remembering to move my foot so as to stretch the muscles of my calf ahead of the cramp. After the second one, I put the heating pad under my calves and went back to sleep.
Gentle stretching exercises are the order of the day.
6 days ago