I am 76 and have had a quad bypass, major lower back surgery with three long screws and cadaver bone used for repair, my thyroid removed as well as my gall bladder and numerous kidney stones removed surgically from my left kidney. My knees hurt like all heck some days. I also have chronic lymphocytic leukemia and am on a daily regimen of a very strong drug to keep it in check. My wife and I moved to a care facility and are in the independent living portion where we can come and go as we please but with the option of going to higher levels of care as needed.
I did all my car work for about forty years...brakes, oil changes, spark plugs, fluid changes, etc but I have had to give it up several years ago. I now let the VW dealer do it all for me. Yes, it is not what I want but age and my body give me little choice. I still try to walk about 5000 - 7000 steps a day. But I look back on all of the things I used to do with pride and satisfaction. And I think that is the way to do it. Rather than lament what you can no longer do, remember and rejoice in the good old days and be glad you had them!