I've been there. Five years ago I had a heart attack and when in the ER they found a spot on my lung which turned out to be cancer. Had half of my left lung removed. They went in through the ribs, inercostal, toward the back side. ˆ had been shooting traditional bows for about 57 years prior, anywhere from 60 lbs to 74 lbs without any problem. It took me a good two years before I could get back to shooting 60 lbs. comfortably. The 74 lbs is part of history. The good news is that you can do it, but you need to work at it with a lot of patience. My best to you.