Mark, Do you live near them? If exercise and diet is something that is important to you and you want them to see the same, perhaps going over there once or twice a week and cooking them dinner with enough for a night of leftovers and then going out and doing an activity, even a simple game of badminton can be exercise disguised as fun. Or a nice walk, stroll... just getting out of the house and DOING can be good for the mental health of folks who are in a mindset slump. Mall walking is good too, plus in Malls there are adequate "rest stops" usually every 3 or 4 stores there is a bench of some variety, if dad needs to sit a bit, ma can go another lap and pick him back up on her next go-round.
Weight loss of 52 pounds