I agree with you on both counts.
I'm a few years behind you Nat (the 48 in my name is when I was born)and still working. I regulary end up picking up heavy boxes and am fortunate that it's no problem. I can still do it. In a few years, I plan to retire and will see what I end up doing to keep busy. I could continue in my job for a good bit more if I wanted but have been there forever already.