Busting my knee on February 28, 2019, when I slipped on ice, & the amazingly successful surgery a week later, proved to be an EYE OPENER, a turning-point in my life. I had been walking/running prior to that, BUT my busted knee (& pre-diabetic blood glucose levels) told me that I had to UP my game.
It has now become second nature. I just put in the steps.
So, it can be done.
IF I can do it, then anyone can.