It is estimated that 1.2 billion adolescents live in the world today, one in five people. In other words, approximately 20% of the world's total population are adolescents (WHO, 2005). They are the adults of tomorrow and their health is a fundamental issue for a healthy society of the future. However, the prevalence of overweight and obesity has increased significantly among young people since the 1980s worldwide (Haug, Samdal, Morgan, Ravens-Sieberer, & Currie, 2006). Over the past 20 years, the prevalence of obesity and overweight has increased at an alarming rate not only in developed countries, but throughout the world (Worobey, 2006, ch.15). The increasing prevalence of obesity has led the World Health Organization (WHO) to recently refer to a “global epidemic” to describe the obesity problem (Tremblay & Doucet, 2000). I explained the prevalence of obesity at two levels: global and Iranian. currently overweight or obese worldwide. Countries around the world have experienced a considerable increase in the prevalence of overweight and obese children and adolescents over the past three decades (Bundred, Kitchiner, & Buchan, 2001; Ramachandran, et al., 2002; Baratta, Degano, Leonardi, Vigneri, & Frittitta, 2006; WHO, 2003). Statistics obtained from various studies in the European region (WHO, 2005) estimate that 10-30% of European school-age children aged 7-11 years and 8-25% of adolescents (14-17 years) are faced with excess body fat. Data from the United States and some European countries suggest that this rise... half of the paper... l., 2008). A review conducted to compare the problem of childhood obesity in Middle Eastern countries revealed that different age groups showed a stable increase in the prevalence of overweight/obesity with increasing age, being male, and increasing status. higher socioeconomic (Mirmiran, Sherafat-Kazemzadeh, Jalali -Farahani, & Azizi, 2010). In Iran, as a country located in the Middle East, a rapid increase in the prevalence of overweight and obesity has been accompanied by an acceleration of the epidemiological and nutritional transition (Maddah, 2007; Malekzadeh, Mohamadnejad, Merat, Pourshams, & Etemadi, 2005). Although the prevalence of obesity among Iranian adolescents is lower than that of developed countries such as the United States, in recent years studies have shown a relatively high prevalence of obesity among Iranian youth as obesity has been the number one major problem one in Iran (Malekzadeh et al.. 2005).