I'm having difficulty believing that I am old because I don't feel old. When I look at myself in the mirror, I look fine. However when I see myself in pictures, especially next to those who are younger, I see that I've aged.
Yeah, I can't do as much as I used to do even though I still do those things but I am never fatigued!
It's more along the lines that, I just don't want to do certain things any longer, even though I still do them(often).
I recently shoveled/wheelbarrow'd 4 yards of mixed stone at my daughter's house over 3 days and spread it all-round her landscape.
Did I need a nap each day? You bet!
When I have my annual physical and my doctor asks me, "how do you feel? I tell the doctor, "I feel GREAT!
I feel somewhere between ages 11-48 because I don't really know what I am supposed to feel like in my 70's".
I still do things around my home, yard, vehicles and work on my own things(around the house/garage). I still cut my lawn with a push mower and snow blow or shovel my driveway in the winter, help neighbors/others. I still ride my bike 20 miles/day in good weather and less in colder temps. And I/we still go to the gym often(varies).
We now have to watch more closely what we eat & how much(quantity) along with how much sleep we get. And I've started to take a nap if I think that I need one. The busier I am, the less sleep I seem to need.