Those of you suffering shoulder issues, do you attribute that to your shooting career, or just general wear? I know our bodies slowly decline as we get older. Joints become stiffer, muscles loss occurs, arthitis can set in, etc. Do you guys think this is accelerated by shooting? I suppose what I'm getting after is I have an extreme fear of my body aging...not so much getting older in general, just not being able to function very well when I'm older.