By the time I am at the tail end of my life, I would hope to go away as peaceful and quickly as possible. Work serves purpose to human lives and counting down the clock until you croak is something I want to do as little as possible. I excercise 3xs a week on average of about an hour a piece, adding running a hour a day is a waste of time.
Look up morbidity compression. Not my area so no views myself but it's a thing, and correlates with regular moderate exercise