Obesity has risen significantly in the United States and is predicted to become the most prevalent public health problem in the United States. Thirty percent of American adults aged 20 - 74-more than 60 million people-are obese. The number of children and teens who are overweight has tripled since 1980. Sixteen percent of children 6 - 19 years-more than 9 million-are considered overweight. If weight gain continues at its present rate, 39% of Americans are estimated to be obese in 2008.