My mind is still that of a teenager.
I believe - cough -that my body is in as good a shape now as then.
Eyesight is good.
Hearing - impaired. Nothing major.
Too loud music and riding motorcycles blunted that faculty.

I really notice my memory lapses.

Information that I have had stored for years is taking longer to access.
Everything is still there, but I have to think about answers rather than 'know' them.
Experiences from over 30 years ago come to mind quicker than those of 15.

I notice other peoples, too.
From Forty the memory takes a downward turn.

Maybe I need to take steps to 'exercise' - shudder - and improve.
Oh why cant I be 19 forever ?