Things got way more difficult physically at seven-oh. Injuries more frequently, and they take longer to heal. Hand/finger coordination more difficult. With shoulder problems I can't do a pull up, and I used to do 10. Just general difficulty in things that used to be easy. I had real difficulty in climbing over a high cylone fence recently. I get out of a car more slowly; never used to think about it. The indignity of it all!
Plus, I'm bored with "working out." If 'd go to a gym regularly, it would solve a lot of problems; I certainly know the drill. But there's so many other things I'd rather be doing. No more training for running races/b-o-r-i-n-g. What do to do? Hiking, exploring, paddleboarding when this shoulder gets functioning. I want to get "exercise" while exploring/having fun, so I'm in a new world of activities to keep some kind of body/mind balance. Working on it.
I've been pretty active all my life, and a lot of the problems are from wear and tear. There's another approach: at my (60th) high school reunion last month, one of the guys told me he had just rented a city condo, and he could drive his car into the garage and take an elevator that opened in front of his front door. He'd given up.