Lately, I've read a lot about some of the myths of of power training. One of the most interesting topics is the theory that if you're used to squatting heavy ( more than twice your body weight, shoulder pressing (more that your body weight) that you can actually end up being half an inch to an inch shorter. I'm not sure exactly how far that's true. From what I read the geletin between the disks in your spine can get compressed causing you shrink a little bit. Maybe that's why a lot of body builders these days aren't very tall. Ronnie Coleman only stands 5'10".