So can working on a lift with you arms above your head most of the day. That's where my bad shoulder came from.[/QUOTE]
Or being tall so you can't ever stand up straight under anything.
I got to where I would spread my feet 4 feet apart just so I didn't screw my back all up.
AND, a lot of my mechanical career life was in transmissions where you have your hands in solvents all day.
Not to mention breathing that crap all day long.