The other lifestyle change that Bob demands of the challengers is that if they smoke, they have to stop. Barbara, who has a 30-year pack-a-day habit, is going to be on Bob's watch list. And if she thinks she'll be able to get around it, Oprah says Barbara will learn the hard way that she won't. "I have to tell you, I've known Bob for 15 years. He has the highest sensitivity to anybody smoking that I've ever seen. If somebody has smoked in the last two weeks in the yard, he can tell that they were there."
Barbara says her last cigarette was "this morning."
"That has to be your last cigarette. I'm serious. There is no tolerance. You have to quit to be on this program," Bob says. "I say this to everyone. Honesty is the first step to making these changes in your life."