You are still considered young. As a person ages, if they can no longer do what they used to do, they start to get upset, and they are right. This may be the worst thing about old age. In recent years, I have been trying the autophagia diet, which means long-term starvation. I recommend you try it, it is very beneficial for the body.
I have heard that it is pretty good. How do you deal with the hunger?
The gradual decline and then the often startling revelation of how far it has fallen is bad. When I had the stroke a few years ago, it was a massive hit across the board. Not sure if it is better or worse.