Choosing a theory or model for program planning: Health promotion is a process that generally requires the selection of an appropriate theory or model for program planning. a program. These health promotion theories or models provide mechanisms that can be used to systematically design behavior change programs. The use of models on theories in turn contributes to the effectiveness and efficiency of the health promotion program. Since not all theories or models are effective in all situations, it is important to choose one that addresses the variables contributing to an individual's behavior. This consideration is part of determining which theory or model is most relevant to the problem and target population. An example of a problem that could benefit from a health promotion theory or model is the problem of childhood obesity. Childhood obesity: Childhood obesity is a major health problem worldwide since more than 20 million children under the age of 5 worldwide are overweight. . In addition to its wide distribution, this health problem constitutes a major problem because it is linked to psychosocial, clinical and economic impacts. It is estimated that young people in today's society will live less healthy and ultimately shorter lives than their parents if this trend of childhood obesity continues (Crawford, 2008). One of the main reasons for the spread of childhood obesity is the physical, societal and environmental factors that play a significant role in putting children at risk. As part of health promotion aimed at reducing the spread and effects of this problem, several theories and models of behavior change measures have been adopted to support and improve positive health behaviors. Typically, these health promotion strategies are intended for use in other fields, such as psychology. This model can be used in counseling psychology through the development of appropriate stress management and depression prevention interventions. On the other hand, social cognitive theory was developed in the field of education as a byproduct of initiatives in the field of social learning theory. Besides the field of nursing, it can be used in other sectors, including psychology, communication and education. In conclusion, the problem of childhood obesity is a global epidemic that has continued to spread due to individual, environmental, and societal factors. Due to its spread and effects, there is a great need to develop appropriate intervention measures and programs through behavior change theories and models. The most appropriate theories and models are the transtheoretical model and social cognitive theory..