Background : Physical activity is one of the key factors in children and teenagers’ health. The present paper follows a qualitative approach to identify subjects’ viewpoints about regular physical activity and determine approaches to promote it based on social marketing mix. Methods: The study was carried out as a qualitative content analysis study in 2020 in Kermanshah city, Iran . Totally, 23 students as the main participants along with five parents and four physical trainers were selected through purposive sampling. After data analysis and extraction of primary codes, four categories emerged based on the elements of social marketing mix (product, price, place, and promotion) along with subcategories.Results: The majority of participants emphasized on the advantages namely prevention of chronic diseases, physical fitness, increased concentration, better learning performance, and a decrease in depression. They noted that they preferred a happy and friendly environment for doing physical activity. The teenagers listed fitness clubs, the media, and social media as preferred places to receive educational messages. Conclusion: The results showed that physical activity in teenagers was affected by personal, environmental, and social obstacles. The results gave an insight and a deeper knowledge about values and motivations in teenagers that affect their decision to do regular physical activity.