This is a good thread. Coming up to 70 yo, 171 lbs and 5'10" and so far no heart attack. I have corrected high blood pressure with meds and a small aspirin a day.
My Dad died at 52 and his dad died at 45. My mother's side is way better.
What do I do? I walk, walk and more walk. Fit bit measures typically 10k steps a day which is typically 1.5 hours of active outdoor walking a day. In summer I cycle more.
Okay so I am retired so I have more time to exercise . I make exercise a priority as if you don't have your health there is not much left.....
Oh yes I hear swimming is good but I don't enjoy it as much as walking. Do something you like for exercise.