At seventy two I feel very fortunate to be in the shape I am in. I believe it's because I'm pretty active, eat right for the most part and I'm sure my genetics/DNA have a vital role in it as well. I can't control that but why should I? My mother at 87 is a bit bent over from an accidental fall years ago but has no other issues. Mentally and physically pretty sharp and able to be independent for the most part with ADLS etc. Her husband takes good care of her and loves her and she is reciprocal, so I'm tickled. Obviously, I do thank the good Lord for it as well, yes!
Now back to me. I'm acutely aware of the fact that things in life are relative. When we play Pickleball for example I notice a variety of people in varying age categories. Most of them have had knee and back as well as other issues. I feel bad for them but try not to show it. I have my share of stiff painful back issues from a lack of stretching every morning and that'll change soon, it must.
Relativity, it's fun!