Tabriz University of Medical Sciences Depiction of Health 2008-9058 13 2 2022 06 13 The Impact of the Structures of Planned Behavior Theory on Social Vitality of the Participants in Sports Aactivities 151 164 10.34172/doh.2022.23 EN Ahmadreza Askari https://orcid.org/0000-0002-5013-9196 Hamid Mohammadi https://orcid.org/0000-0001-6785-5140 Hamid Zahedi https://orcid.org/0000-0002-9520-1029 Hosein Shahnazi https://orcid.org/0000-0002-5901-3901 Journal Article 10.34172/doh.2022.23 2021 09 08 2021 10 06 Background. Happiness and vitality are among the essential spiritual and psychological needs of human beings. This study mainly aimed to present a model of participation in sports activities with the level of social vitality and investigated the moderating role of awareness based on the theory of planned behavior. Methods. In this descriptive and correlational study, the survey method was adopted to collect the required data. The study population consisted of 120,000 males and females participanting in group and individual sport activities and having been introduced by Municipality of Isfahan. A total of 384 participants including 247 females with an average age of 42±14.1 as well as 137 males with an average age of 46±10.66 were selected as our final sample using stratified random sampling. To collect the data, the questionnaires of Oxford Argil Happiness (OHI) (2001) and Planned Behavior of Karimi et al (2012) were used. Correlation coefficient as well as regression and structural equations were conducted by using SPSS and Amos softwares version 22 for data analysis. Results. The results showed that there was a significant positive relationship between willingness to do work and planned behavior of participation in sports activities, planned behavior of participation in sports activities and social vitality (P≤0.05). Conclusion. It was concluded that raising the awareness of people about the beneficial effects of sports may have facilitated the planning to establish people's participatory behavior in sport activities and, consequently, to promote and maintain social happiness and vitality of people.