Overweight and obesity have become a serious public health problem across the globe particularly during the last three decades. Since 1980, the greatest increase in this medical condition has taken place in the United States. Today the global prevalence of it exceeds half a million people . In 2010, there were 43 million obese preschool children, and this age group has developed overweight and obesity in recent years more than ever before .
Obesity is a severe form of excess body weight, and both conditions predispose people to noncommunicable diseases such as diabetes mellitus, coronary heart disease, hypertension, cancer, psychological depression, and osteoarthritis. When excess body weight occurs in children, there is greater risk that they will still be overweight in the adult years than children who maintain normal weight [1, 2, 3].