Muscles Trembling/Spasming After Workout?
Lately (the past two or so years), I've noticed that my muscles twitch/shake/tremble/spasm/whatever you want to call it after my workouts. They never used to do this before. Example: If do calf raises that day, while driving home, I'll notice that my calf muscles are trembling, like jumping a little. Makes it kinda hard to drive. LOL Or, if I do shoulder presses that day, I'll notice that my shoulder muscles tremble if I raise my arms overhead. I'm not talking about the typical feeling-like-jelly-because-I-trained-intensely sensation. It's more of a serious, out-of-control jumping/spasm. The only way to stop it is to relax the muscle and/or massage the affected area.
Anyone else experience this or know what could be causing this? I don't know if it's over-exertion. If anything, I trained harder when I younger than I do now.