Trab,
I'm 65 and I took up archery when I was about 50. At the time, I was heavily into mountaineering, and didn't take archery very seriously. I mainly shot arrows around the backyard to have something to do with my kids and to relieve stress from working.
When I was about 55, I became interested in traditional archery, and bought a 65# bow. It was on the edge of my ability to pull that bow then, although I was able to crank off 20 pullups as part of my training for rockclimbing. Although I soon switched to lighter-weight bows that I could shoot better, I always kept that 65# bow. It is a beautiful bow, and I guess I keep it as sort of a benchmark as to how I'm doing physically. And you know what? Even though I can't crank off anywhere near as many pullups as I could 10 years ago, and I can't run up mountains anymore, I can shoot that 65# bow better than I could 10 years ago. I took it out to the archery range yesterday, just to see how I could do, and I managed to shoot 25 good arrows, holding at full draw, with rest breaks in between shots as I walked between targets, before my shooting fell apart. 10 years ago, I couldn't even shoot 5 good arrows with that bow.
BTW, I shot that deer you see in my picture two years ago at the tender age of 63. I have found that as I have become less able to climb the high mountains, I have become more interested in archery and bowhunting, which have become my #1 activities as I get older.