I too seem to have this, not sure if it was a cramp or not. I never felt a super tightening moment, but I suppose I could just be forgetful. They have been extremely tight for the last 6 days though. I've iced them, rolled them, soaked in a hot tub, took ibueprofin, and stretched on an inclined board. It's gotten better but is definitely still there. Does this sound like a strain sort of deal?