Good replies. I'm 36, but have stayed pretty healthy. I'm recovering from a roator cuff issue, but it was my non-pulling arm. I used to have my weight down to 60# and loved it, but I cranked it up when I went to mechanicals. 70# is not too much for me.
What I found even more odd was that my draw is longer than most. Again, i'm 5'8". Where do you guys anchor?
I think you anchor further back than most archers. I'm six feet and about 200 and I draw 29 inches. The kisser botton goes to the corner of my mouth and my thumb runs along my jawline (I have D-loop and caliper release). I determined this at my pro shop when I bought my bow. He kept changing modules until I was comfortable.
A common way to determine your approximate draw length is to measure your wingspan, tip to tip with arms outstretched, and divide by 2.5. That will get you close.
That said, you you shoot comfortably and well, I wouldn't change a thing. Personally, I'd shoot behind my back if it increased my accuracy and I was comfortable. Also the longer draw length will give you a little more speed. Sounds like you should keep doing what you are doing.