I was super fit and its hard to do nothing especially with 2 football mad young boys (and my fitness now shocking which is depressing). Sometimes its just crossing my legs while watching the TV that triggers it although I have a tendancy for a quick football dribble in the back garden which really sets it off - but then as I dont understand it I havent really been worried about damaging anything just about getting the symptoms.

I think you are right especially when some symptoms appear to be gradually improving. My physio actually reccommended I started running again - on tarmac just to see what happens ! I knew that was madness so never took his advice. Just a quick jog to catch one of my boys can trigger pain through my bum which I have taken as a warning.