Physical fitness be damned!
There are those of us who simply are no longer capable .. but we're still armed.
I have lived more than 7 decades. Ain't no match for a 20 year old. Awareness and atttitude have everything to do with it.
I still have the awareness ... still have the attitude. A twenty-something may knock me to the ground but they better render me incapable from the first blow. If not, they'll never see thirty ... I REFUSE TO BE A VICTIM!