Do your parents have it or family members?
Mine did actually rise above normal levels when I stopped training. I was working in a town in Tasmania, no gym, middle of winter, freezing cold.... So ok maybe I had a pizza once a week from the pub and 6 beers. But I don't think that is why the Grim Reaper showed up and put my fatty death level at 8.8.
I also got engaged/married during this time. Maybe some connection we should investigate between marriage and being sentenced to death?