I had a grandfather who was never sick, cleaned the house everyday, fixed things up, ironing all clothes, cutting grass with hand scissors, never complain about backpain or anything , but once he got something, it was heart attack, and then lung cancer.Worst thing is the guy is a rock, early 70s but looks like he is in his late 50s, farmed all his life, will work all day and night during harvest season like it was nothing, literally a force of nature...