1. Lahart I, Darcy P, Gidlow C, Calogiuri G. The Effects of Green Exercise on Physical and Mental Wellbeing: A Systematic Review. Int J Environ Res Public Health. 2019; 16(8):1352. doi: 10.3390/ijerph16081352. PubMed PMID: 30991724; PubMed Central PMCID: PMC6518264. ## 2. Schwartz J, Rhodes R, Bredin S, Oh P, Warburton D. Effectiveness of Approaches to Increase Physical Activity Behavior to Prevent Chronic Disease in Adults: A Brief Commentary. J Clin Med. 2019;8(3):295. doi: 10.3390/jcm8030295. PubMed PMID: 30832260; PubMed Central PMCID: PMC6462966. ## 3. Malm C, Jakobsson J, Isaksson A. Physical Activity and Sports-Related Health Benefits: A Review with Insight into the Public Health of Sweden. Sports. 2019;7(5):127. doi: 10.3390/sports7050127. PubMed PMID: 31126126; PubMed Central PMCID: PMC6572041. ## 4. Huotari P, Nupponen H, Mikkelsson L, Laakso L, Kujala U. Adolescent Physical Fitness and Activity as Predictors of Adulthood Activity. J Sports Sci. 2011;29(11):1135-1141. doi: 10.1080/02640414.2011.585166. PubMed PMID: 21777154. ## 5. Telama R, Yang X, Viikari J, Välimäki I, Wanne O, Raitakari O. Physical Activity from Childhood to Adulthood: A 21-Year Tracking Study. Am J Prev Med. 2005;28(3):267-273. doi: 10.1016/j.amepre.2004.12.003. PubMed PMID: 15766614. ## 6. Cid L, Pires A, Borrego C, Duarte-Mendes P, Teixeira DS, Moutão JM, et al. Motivational Determinants of Physical Education Grades and the Intention to Practice Sport in the Future. PLoS ONE. 2019;14(5):e0217218. doi: 10.1371/journal.pone.0217218. ; PubMed PMID: 31120973; PubMed Central PMCID: PMC6592572. ## 7. Issad Baddou, Asmaa El Hamdouchi , Imane El Harchaoui, Kaoutar Benjeddou, Naima Saeid, Mohammed Elmzibri, et al. Objectively Measured Physical Activity and Sedentary Time Among Children and Adolescents in Morocco: A Cross Sectional Study. BioMed Res Int. 2018; Article ID 8949757. doi: 10.1155/2018/8949757. PubMed PMID: 30356414; PubMed Central PMCID: PMC6178184. ## 8. Wang W, Hsieh Y, Hsueh M, Liu Y, Liao Y. Accelerometer-Measured Physical Activity and Sedentary Behavior Patterns in Taiwanese Adolescents. Int J Environ Res Public Health. 2019;16(22):4392. doi: 10.3390/ijerph16224392. PubMed PMID: 31717677; PubMed Central PMCID: PMC6888554. ## 9. Sfandyari B, Ghorbani S, Rezaeeshirazi R, Noohpisheh S. The Effectiveness of an Autonomy-Based Exercise Training on Intrinsic Motivation, Physical Activity Intention, and Health-Related Fitness of Sedentary Students in Middle School. Int J Sch Health. 2020;7(1):40-47. doi: 10.30476/intjsh.2020.84678.1046. ## 10. Deci EL, Ryan RM. Intrinsic Motivation and Self-Determination in Human Behavior. New York: Plenum Press. 1985. ## 11. Deci EL, Ryan RM. What and Why of Goal Pursuits: Human Needs and the Self-Determination of Behavior. Psychol Inq. 2000;11(4):227-268. doi: 10.1207/S15327965PLI1104-01. ## 12. Ryan RM, Deci EL. Intrinsic and Extrinsic Motivations: Classic Definitions and New Directions. Contemp Educ Psychol. 2000;25(1):54-67. doi: 10.1006/ceps.1999.1020. ## 13. Ryan RM, Deci EL. Brick by Brick: The Origins, Development, and Future of Self-Determination Theory. In A. J. Elliot (Ed.), Advances in Motivation Science. Cambridge, MA: Elsevier Inc. 2019; 6: 111-156.doi: 10.1016/bs.adms.2019.01.001. ## 14. Ryan RM, Deci EL. Overview of Self-Determination Theory: An Organismic Dialectical Perspective. In EL Deci, RM Ryan. (Eds.), Handbook of Self-Determination Research. 2002: 3-33. ## 15. Ryan RM, Bradshaw EL, Deci EL. A History of Human Motivation Theories in Psychology. In RJ Sternberg & WE Pickren. Cambridge, UK: Cambridge University Press. 2019: 391-411. ## 16. Vansteenkiste M, Ryan RM, Soenens B. Basic Psychological Need Theory: Advancements, Critical Themes, and Future Directions. Motiv Emot. 2020;44:1-31. doi: 10.1007/s11031-019-09818-1. ## 17. Ryan RM, Deci EL. Self-Determination Theory: Basic Psychological Needs in Motivation, Development, and Wellness. New York: Guilford Publishing. 2017. ## 18. Meng HW, Whipp PR, Dimmock JA, Jackson B. The Effects of Choice on Autonomous Motivation, Perceived Autonomy Support, and Physical Activity Levels in High School Physical Education. J Teach Phys Educ. 2013;32(2):131-148. doi: 10.1123/jtpe.32.2.131. ## 19. Lochbaum M, Jean-Noel J. Perceived Autonomy-Support Instruction and Student Outcomes in Physical Education and Leisure-Time: A Meta-Analytic Review of Correlates. RICYDE. 2016;43(12):29-47. doi: 10.5232/ricyde2016.04302. ## 20. Chang YK, Chen S, Tu KW, Chi LK. Effect of Autonomy Support on Self-Determined Motivation in Elementary Physical Education. J Sports Sci Med. 2016;15(3):460-466. PubMed PMID: 27803624;PubMed Central PMCID: PMC4974858. ## 21. Moreno-Murcia JA, Sanchez-Latorre F. The Effects of Autonomy Support in Physical Education Classes. RICYDE. 2016;43(12):79-89. doi: 10.5232/ricyde2016.04305. ## 22. Krejcie RV, Morgan DW. Determining Sample Size for Research Activities. Educ Psychol Meas. 1970;30(3):607-610. doi:10.1177/001316447003000308. ## 23. Hagger MS, Chatzisarantis NLD, Culverhouse T, Biddle SJH. The Process by Which Perceived Autonomy Support in Physical Education Promote Leisure-Time Physical Activity Intentions and Behavior: A Trans-Contextual Model. J Educ Psychol. 2003;95:784-795. doi: 10.1037/0022-0663.95.4.784. ## 24. Baard PP, Deci EL, Ryan RM. Intrinsic Need Satisfaction: A Motivational Basis of Performance and Wellbeing in Two Work Settings. J Appl Soc Psychol. 2004;34:2045-2068. doi: 10.1111/j.1559-1816.2004.tb02690.x. ## 25. Pelletier LG, Rocchi MA, Vallerand RJ, Deci EL, Ryan RM. Validation of the Revised Sport Motivation Scale (SMS-II). Psychol Sport Exerc. 2013;14(3):329-341. doi: 10.1016/j.psychsport.2012.12.002. ## 26. Hagger MS, Chatzisarantis NLD. The Ttrans-Contextual Model of Autonomous Motivation in Education: Conceptual and Empirical Issues and Meta-Analysis. Rev Educ Res. 2016;86(2):360-470. doi: 10.3102/0034654315585005. PubMed PMID: 27274585; PubMed Central PMCID: PMC4873731. ## 27. Hagger MS, Chatzisarantis NLD, Harris J. The Process by which Relative Autonomous Motivation Affects Intentional Behavior: Comparing Effects Across Dieting and Exercise Behaviors. Motiv Emot. 2006;30:306-320. doi: 10.1007/s11031-006-9046-5. ## 28. Hagger MS, Chatzisarantis N, Barkoukis V, Wang J, Baranowski J. Perceived Autonomy Support in Physical Education and Leisure Time Physical Activity: A Cross-Cultural Evaluation of the Trans-Contextual Model. J Educ Psychol. 2005;97(3):376-390. doi: 10.1037/0022-0663.97.3.376. ## 29. Huhtiniemi M, Sääkslahti A, Watt A, Jaakkola T. Associations among basic Psychological Needs, Motivation and Enjoyment within Finnish Physical Education Students. J Sports Sci Med. 2019;18:239-247. PubMed PMID: 31191093; PubMed Central PMCID: PMC6544006. ## 30. Su YL, Reeve J. A Meta-Analysis of the Effectiveness of Intervention Programs Designed to Support Autonomy. Educ Psychol Rev. 2011;23:159-188. doi: 10.1007/s10648-010-9142-7. ## 31. Ghorbani S, Noohpisheh S, Shakki M. Gender Differences in the Relationship Between Perceived Competence and Physical Activity in Middle School Students: Mediating Role of Enjoyment. Int J Sch Health. 2020;7(2):14-20. doi: 10.30476/intjsh.2020.85668.1056. ## 32. Gholidahaneh MG, Ghorbani S, Esfahaninia A. Effects of Basic Psychological Needs Satisfaction in the Physical Education on Leisure-Time Physical Activity Behavior of Primary School Students: Mediating Role of Autonomous Motivation. Int J Sch Health. 2020;7(2):46-53. doi: 10.30476/intjsh.2020.86028.1068. ##