My memories of my parents when they were the age I am now are not of mobile, young people, but (my mum especially) of someone whose body was struggling with life. Struggling to get around and with a mental outlook of being weary of life - old.
I know a few people my age who I was shocked to discover WERE my age, but for the most part, I do not see people who are now, as my parents were at this age.
I haven't really been able to fathom out why this is.
My grandpa used to tell the tale of his father finishing breakfast by drinking the fresh bacon grease out of a tin cup, then taking the old coffee pot off the stove and literally pouring the scalding hot coffee down his gullet. I guess the coating of grease insulated his esophagus from being burned? Who knows?
Health wise, I have never smoked or taken drugs and haven't drank alcohol for years (decades) as I just haven't found drinks that I prefer over soft drinks.
But I eat wrong and I know that is an issue for me.
But more than physical health, it is the mental health and view of the world that I found the most shocking between me and my parents. They just seemed so world weary by the time I was 20, so they would be around 55.