1. 1. Qeysrayan A. Survey of social, economic dimensions of aging phenomenon in Iran. J Populat. 2009;69(70): 1-28.

2. 2. Iran SCo. Detailed results of the general census of population and housing in the country Iran: Statistical Center of Iran; 2016 [cited 2017]. Available from: www.sarshomari95.ir.

3. 3. Pavot W, Diener E. The Satisfaction With Life Scale and the emerging construct of life satisfaction. J Posit Psychol. 2008;3(2):137-52. [DOI:10.1080/17439760701756946]

4. 4. Nabevi S. The study of Catariya Yoga on depression of elders in elder centre of tehra Farzanegan. Tehran: Islamic Azad University, breach science & research; 2013.

5. 5. Skinner B. Enjoy old age: a program of self- management. Tehran: Roshd; 2000.

6. 6. Townsend P. The family Life of old People. London: Penguin Books; 2014.

7. 7. Salmela JH, Monfared SS, Mosayebi F, Durand-Bush N. Mental skill profiles and expertise levels of elite Iranian athletes. Int J Sport Psychol. 2009;39(1):361-73.

8. 8. Heinrich LM, Gullone E. The clinical significance of loneliness: a literature review. Clin Psychol Rev. 2006;26(6):695-718. [DOI:10.1016/j.cpr.2006.04.002] [PMID]

9. 9. Krause-Parello CA. Loneliness in the school setting. J Sch Nurs. 2008;24(2):66-70. [DOI:10.1177/10598405080240020301] [PMID]

10. 10. Michela JL, Peplau LA, Weeks DG. Perceived dimensions of attributions for loneliness. J Pers Soc Psychol. 1982;43(5):929. [DOI:10.1037/0022-3514.43.5.929] [PMID]

11. 11. Routasalo PE, Savikko N, Tilvis RS, Strandberg TE, Pitkala KH. Social contacts and their relationship to loneliness among aged people - a population-based study. Gerontology. 2006;52(3):181-7. [DOI:10.1159/000091828] [PMID]

12. 12. L J. Social work practice: A generalist approach. New York: McGraw –Hill; 2009.

13. 13. Hunter J, Csikszentmihalyi M. Happiness in every day life: the uses of experience sampling. J happiness stud. 2013;4(2):182-99.

14. 14. Walker SC, Mikheenko YP, Argyle LD, Robbins TW, Roberts AC. Selective prefrontal serotonin depletion impairs acquisition of a detour-reaching task. Eur J Neurosci. 2006;23(11):3119-23. [DOI:10.1111/j.1460-9568.2006.04826.x] [PMID] [PMCID]

15. 15. Pinto JM, Fontaine AM, Neri AL. The influence of physical and mental health on life satisfaction is mediated by self-rated health: A study with Brazilian elderly. Arch Gerontol Geriatr. 2016;65:104-10. [DOI:10.1016/j.archger.2016.03.009] [PMID]

16. 16. Bowling A. Do older and younger people differ in their reported well-being? A national survey of adults in Britain. Fam Pract. 2011;28(2):145-55. [DOI:10.1093/fampra/cmq082] [PMID] [PMCID]

17. 17. Mobasheri M, Moezy M. The prevalence of depression among the elderly population of Shaystegan and Jahandidegan nursing homes in Shahrekord. J Shahrekord Univ Med Sci. 2010;12(2):89-94.

18. 18. Argyle M, Lue L. The happiness of extraverts. J Pers Individ Differ. 2011;11(2):112-21.

19. 19. Orlick T. Psyching for sport, mental training for athletes. Champaign, France: leisure press; 2008.

20. 20. Salmon P. Effects of physical exercise on anxiety and sensitivity to stress. London & New York: Rutledge, Taylor & Francis Group; 2008.

21. 21. Li CP. Life satisfaction as a predictor of mortality hazard among elderly people in the United Kingdom and Taiwan. J Nurs Res. 2013;21(1):26-38. [DOI:10.1097/jnr.0b013e3182828e98] [PMID]

22. 22. Vaez Mosavi M, Mosayebi F. Sport psychology. Tehran: Samt publication; 2013.

23. 23. Pronk NP, Crouse SF, Rohack JJ. Maximal exercise and acute mood response in women. Physiol Behav. 1995;57(1):1-4. [DOI:10.1016/0031-9384(94)00195-B]

24. 24. Thompson P. I don\'t feel old. J Elder People. 2008;12(3):23-47.

25. 25. Behrami F, Ramazani A. The role of internal- External religiosity believes in mental health and depression of elderly. Tehran: Rehabituation; 2016.

26. 26. Abrams M. Role of the family to prevent feeling lonely in elderly people. J Am Psychol. 2010;63(2):35-54.

27. 27. Nicholls AR, Polman RCJ, Levy AR. A path analysis of stress appraisals, emotions, coping, and performance satisfaction among athletes. Psycho Sport Exerc. 2012;13(3):263-70. [DOI:10.1016/j.psychsport.2011.12.003]

28. 28. Delavar A. Introduction of theoretical and operational research in social and human science. Tehran: Roshd; 2014.

29. 29. Russell D, Peplau LA, Cutrona CE. The revised UCLA Loneliness Scale: concurrent and discriminant validity evidence. J Pers Soc Psychol. 1980;39(3):472-80. [DOI:10.1037/0022-3514.39.3.472] [PMID]

30. 30. Jowkar B, Salimi A. Psychometric properties of the short form of the social and emotional loneliness scale for adults (SELSA-S). Int J Behav Sci. 2011;5(4):311-7.

31. 31. Alipoor a, Noorbala aa. A preliminary evaluation of the validity and reliability of the Oxford happiness questionnaire in students in the universities of Tehran. Iranian J Psychiat Clin Psychol. 1999;5(1):55-66.

32. 32. Purtaghi G, Pakpour A. Happiness, self-efficacy and academic achievement among students of baqiyatallah university of medical sciences. J Med Educ Dev. 2014;7(13):45-56.

33. 33. Rahimi A. The role of happiness in recovery self- confidence elders in center of elders of Sari. Sari Islamic Azad University, Sari branch; 2012.

34. 34. Panahi K. The effect of exercise on decreasing anxiety of pre university female students in region 12 of Tehran. Tehran Branch of research of Tehran education; 2009.

35. 35. Sedaghati P, Khalaji H, Kouzehchian H, Arjmand A. Dose a regular walking have any effect on the general, trait and state anxiety of pregnant women? J Olympics. 2008;16(42):19-28.

36. 36. Tseng CN, Gau BS, Lou MF. The effectiveness of exercise on improving cognitive function in older people: a systematic review. J Nurs Res. 2011;19(2):119-31. [DOI:10.1097/JNR.0b013e3182198837] [PMID]

37. 37. Melillo K, Houde S. Neuropsychiatric and mental health nursing. Sudbury, MA: Jones and Bartlett Publishers; 2005.

38. 38. Riley-Doucet CK. Use of Multisensory Environments in the Home for People with Dementia. J Gerontol Nurs. 2009;35(5):42-52. [DOI:10.3928/00989134-20090331-01] [PMID]

39. 39. Netz Y, Wu MJ, Becker BJ, Tenenbaum G. Physical activity and psychological well-being in advanced age: a meta-analysis of intervention studies. Psychol Aging. 2005;20(2):272-84. [DOI:10.1037/0882-7974.20.2.272] [PMID]

40. 40. Oken BS, Zajdel D, Kishiyama S, Flegal K, Dehen C, Haas M, et al. Randomized, controlled, six-month trial of yoga in healthy seniors: effects on cognition and quality of life. Altern Ther Health Med. 2006;12(1):40-7. [PMID] [PMCID]

41. 41. Sharma NR, Yadava A, Hooda D. Effect of yoga on psycho-physical functions. J Indian Psychol. 2005;23(1):37.

42. 42. Sun F, Norman IJ, While AE. Physical activity in older people: a systematic review. BMC Public Health. 2013;13:449. [DOI:10.1186/1471-2458-13-449] [PMID] [PMCID]

43. 43. Salem G, Skinner J, Chodzko- Zajko W. Exercise and physical activity for older adults. J Med Sci Sports Exerc. 2013;41(3):1510-30.

44. 44. Lane AM, Lovejoy DJ. The effects of exercise on mood changes: the moderating effect of depressed mood. J Sports Med Phys Fitness. 2001;41(4):539-45. [PMID]

45. 45. Butters MA, Whyte EM, Nebes RD, Begley AE, Dew MA, Mulsant BH, et al. The nature and determinants of neuropsychological functioning in late-life depression. Arch Gen Psychiatry. 2004;61(6):587-95. [DOI:10.1001/archpsyc.61.6.587] [PMID]

46. 46. Hatami Milagerdi L, Kermanshahi S, Memarian R. Survey the exercise effects of regular training program on depressive children age 8-12 years old underling of hemodialysis in medical center in Tehran. Daneshvar Med. 2009;9(40):23-8.