I injured my shoulder when I first got into archery around age 14. I wanted a higher draw weight/faster arrow and would not settle for it to be to low. Deer came in and I could not get the bow back it was probably around 30 deg out. I kept trying and ended up injuring my shoulder pretty bad. The adrenaline was running pretty good and I did not know I had injured it until later that night.
Ever since then I stay within a reasonable bow poundage for what I can handle. My shoulder has never been the same since that day and still bothers me on occasion.