Hi panela78;
At 79, and not near the threshold for surgery, you are a candidate for starting to exercise. If you do you may make it to 85 and beyond without needing to concern yourself with surgery. If you do not, you may well be a candidate for surgery. I am not a doctor or a jock, but I started a lite exercise program a few years ago and I can say without hesitation that it has made all the difference in the world concerning my overall health. At 88 I am not lucky and do not have good genes. But I did make the decision to make exercise a part of my life and am eternally grateful that I did. I exercise at home while listening to classical music and you can too. Good Luck!