About eight years ago I snapped one of the knobbly bits off the end of my humerus, sling only for 6 weeks by which time my tendons shrank so i was 30 degrees off straight (the physio had this cool protractor thing to measure it before and after each 'session'. By 'session, I mean quarter hour of my mind battling with 'how can such a nice pretty lady make me hurt so much?!?')
I still can't straighten mine fully though it has improved by 2 or 3 degrees a year since i did it. Mine ached at odd points for a long while after, definitely remember it aching in pulling things (for me it was hospital beds and 'manual handling' old folk). Oh and it did click every so often for the first six months.