"Just shut up and go running."
'You go, girlfriend!'
No, YOU go! Running at age 50+ is not fun nor good.
You'll find out someday... if you're lucky enough to live longer than Jim Fixx did! (jogging 'pioneer' who died at 43 of heart failure)
I'm 46, and run 5 miles / day. Guess I've got 4 years left...
Although my Mom walked 3 miles daily until she broke her ankle at 80.