re: At what point in life did you realize you were "old"

I'm 50 and just everything makes me feel old. Gray hair, little more weight( working out but my energy level sucks) young women look at me like they look at their dad. I used to play full court basketball until my early forties then my knees went out , I could dunk. A basketball all the way into my mid thirties ( I'm 6'4") .... I probably couldn't touch the net now.................. "........