It's not "cool" to be fat, still obesity epidemic is increasing with passing years especially among children. Obesity is defined as an excessive accumulation of body fat. Obesity is present when total body weight is more than 25 percent fat in boys and more than 32 percent fat in girls. Childhood obesity increased from 5 percent in 1964 to about 13 percent in 1994. Today, it is about 20 percent - and rising. According to American Obesity Association, 2006, approximately 30.3% of children (ages 6 to 11) are overweight and 15.3% are obese. For teens (12 to 19) the rate is almost identical: 33.4% overweight, and 15.5% obese. Studies have shown that a child who is obese between the ages of 10 and 13 has an 80 percent chance of becoming an obese adult. Now these are alarming figures.