Obesity is one of the basic medical and social problems of today's world. In recent decades, obesity has dramatically increased worldwide (e.g. in the United States more than 35% and in Europe more than 31% of adults are obese.
It is a problem in both developing and developed) [1-3] countries. Deficits in motivation, self-efficacy, and self-esteem, sedentary lifestyles and psychosocial problems complicate treatments for obesity.
Thus, a comprehensive management approach needs to address these issues as well. However, conservative weight-reduction programs often fail or patients regain weight initially lost because motivation for weight maintenance decreases