She is a mother of four, a yoga fanatic and married to Oprah Radio host Dr. Mehmet Oz. Lisa Oz joins Bob to talk about life as the wife of America's Doctor, as well as her own approach to diet and exercise.

As a cardiac surgeon and author of numerous books on nutrition, one would think Dr. Oz was always a healthy eater. But Lisa says it was actually her influence that nudged him down the road to good health. Lisa says Dr. Oz grew up eating typical American fare, including foods like fluffer-nutter sandwiches, whereas she grew up in a household where healthy eating was a top priority.

Despite Bob's best attempts to find out if Dr. Oz ever slips up on his diet today, Lisa says he truly does practice what he preaches. "There's lots of dirt, but none of it's nutritional," she jokes. "He doesn't like bad food! Even if I had some [candies] and offered him one, he wouldn't take them. He doesn't like it."

Lisa says her mother was a nutritional consultant among other things, and her father is a cardiac surgeon. When Lisa was in her teens, she says her mother decided that the entire family would switch to a vegetarian diet, which Lisa says she has followed ever since. Whole grains and organic foods were a part of their everyday diet. "That was always emphasized in our house—healthy, healthy," Lisa says.

Lisa says exercise was always an important part of her life, too. Growing up, she says she was involved in sports and was the captain of her college tennis team. These days, Lisa says she and Dr. Oz have a gym in their home where she tries to work out for an hour each day. She says her current regimen includes yoga and Pilates, as well as some cardio and weight training.