Mattu!

I too agree with Paul ,Zak and Shoot em up. Shoot fewer arrow's at a time and build your strength up ,you've already proven you can draw it ,so less arrow's and shoot a couple time's a day or even once a day, and you'll be shooting in the mid 60#'s before you know it . If your unable to continue to shoot your bow at 60# then I'd look at either a new bow that suit's you better or new limb's ,But I wouldn't screw around with string adjustment's ,because this could become more of a problem than an easy fix.

nubo