Over the past 20 years the prevalence of obesity in children has more than doubled from 6.5 percent in 1980 to 17 percent in 2006.  Obesity among adolescents ages 12 to 19 has more than tripled from 5 to 17.6 percent.  The Health Energetic Active Teens program seeks to reduce the number of obese children through exercise and healthy eating.  During the H.E.A.T. program youth ages 11-18 meet at the YMCA twice a week to engage in a variety of sports and learn proper eating habits.  During the 12 week program participants have access to the entire YMCA facility.