Yep, I get this and you've managed to describe it better than I've managed to when telling other people about it. I can feel it in the evening after a hard session and don't sleep well for the first hour or two, and the twitching really annoys the wife!
No idea on the medical side, but I'm assuming it's nothing to worry about.
No idea on the medical side, but I'm assuming it's nothing to worry about.