Sport Sciences Research institute Sport Psychology Studies 2345-2978 10 37 2021 09 23 Investigating the Role of Religious Beliefs on the Tendency to Use energy Substances in Professional Athletes Investigating the Role of Religious Beliefs on the Tendency to Use energy Substances in Professional Athletes 207 222 2373 10.22089/spsyj.2021.9739.2069 FA Reza Nikbakhsh Associate Professor, Department of Physical Education, South Tehran Branch, Islamic Azad University, Tehran, Iran 0000-0002-1629-781X Journal Article 2020 11 21 The aim of this study was to investigate the role of religious beliefs on the tendency to use energy substances in professional athletes. The present study is one of the applied researches that was conducted in the field. The method of the present study was survey. The statistical population of the present study included all professional athletes in the country in different disciplines and leagues that had high levels of active sports. Due to the uncertainty of the population size, based on the Cochran sample size formula in the uncertainty of the population, 384 people were identified as the research sample. After distributing and collecting the questionnaires, 361 questionnaires were analyzed. The results of the present study showed that religious beliefs, including belonging to the principles of religion and commitment to the branches of religion, reduce the tendency to use energetic substances in professional athletes The aim of this study was to investigate the role of religious beliefs on the tendency to use energy substances in professional athletes. The present study is one of the applied researches that was conducted in the field. The method of the present study was survey. The statistical population of the present study included all professional athletes in the country in different disciplines and leagues that had high levels of active sports. Due to the uncertainty of the population size, based on the Cochran sample size formula in the uncertainty of the population, 384 people were identified as the research sample. After distributing and collecting the questionnaires, 361 questionnaires were analyzed. The results of the present study showed that religious beliefs, including belonging to the principles of religion and commitment to the branches of religion, reduce the tendency to use energetic substances in professional athletes https://spsyj.ssrc.ac.ir/article_2373_5f14615696649541a025d3d0f8e0447f.pdf