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BY AMY CAPETTA
For as long as Liz U. can remember, she's been waiting to have a heart attack.
"Talking about heart trouble was just as much a part of my life as eating breakfast," she explains. The 59-year-old Illinois native has a long family history of cardiovascular problems: Both of her parents and three of her grandparents passed away from heart disease, so Liz had resigned to meeting the same fate. "I just accepted I had bad genes and I was going to be a mess," she says.
Overweight since middle school — "I only wanted Danishes and chocolate milk as a kid" — Liz considered food her emotional crutch. She reached 324 pounds at one point, with pizza, ice cream, and chocolate as her diet staples, along with fried fast...