There are many areas to explore, from child obesity to diabetes to nutrition and exercise. We're just getting started with our reporting, so now is a good time to offer ideas and suggestions.

The factors that we have studied include reproductive factors, female hormone use, smoking, obesity, exercise, diet, neighborhood characteristics and experiences of racism.

Based on the statistics, most of the charges saying that obesity caused various diseases or that obesity caused thousands of deaths were simply not supported.

Exercise is one of the best ways in preventing the rapid growth of obesity in America.

Even those elderly people who did modest amounts of gentle exercise, such as walking for 15 minutes three times a week, appeared to benefit. Based on these findings, we can advise older people to 'use it even after you start to lose it,' because exercise may slow the progression of age-related problems in thinking.

What we learned was that the modest amount of exercise would reduce a person's risk by about 40 percent.