Question: I have read that we calculate obesity differently in the U.S. from international agencies. Namely, we calculate a Body Mass Index (BMI) of 30 and over rather than 28 and over, which is used elsewhere. Is that correct or not?

Question: You gave us statistics for a number of countries. I'm wondering if there are contemporary statistics from the Mediterranean countries?

Question: This question is for Dr. Simon. In your slide about the benefits of exercise, we saw it starting to trend upward after three thousand units. Can you explain why that might be?

Question: Dr. Benson, most of our careers we have stress. Is stress cumulative and if it is, can it be reversed, the damage of stress during one's career, when a person is slowing down (with aging) in retirement?

Question: Dr. Simon, on the subject of the kinds of exercise that would be beneficial, running for some of us is an activity that's difficult to do but competitive sports is something that people can do without thinking about it. What do you think about racquetball, basketball or exercises like that?

Question: Dr. Sacks, do you believe the ketosis state of a very low-carbohydrate diet, such as Atkins, is dangerous?

Question: If I have 15 minutes in the morning, should I be exercising or should I be doing meditation?

Question: Ideally, for optimal health and longevity, how thin should you be? What should your ideal BMI be?