Obesity rates among children in the U.S. have doubled since 1980 and have tripled for adolescents. About 17 percent of children aged 2 to 19 are considered overweight compared to over 66 percent of adults who are considered overweight or obese. Earlier onset of type 2 diabetes, heart disease, and obesity-related depression in children and teens is being seen more frequently by health care professionals. The longer a person is obese, the more significant obesity-related risk factors become. Given the chronic diseases and conditions associated with obesity and the fact that obesity is difficult to treat, prevention is extremely important.