1. Adams, K. B., Leibbrandt, S., & Moon, H. (2011). A critical review of the literature on social and leisure activity and wellbeing in later life. Ageing & Society, 31, 683–712.
2. Allison, P. (1984). Event history analysis. Thousand Oaks: Sage Publications.
3. American College of Sports Medicine. (1998). American College of Sports Medicine position stand. The recommended quantity and quality of exercise for developing and maintaining cardiorespiratory and muscular fitness, and flexibility in healthy adults. Medicine Science in Sports Exercise, 30, 975–991.
4. Anderson, L. B., Schnohr, P., Schroll, M., et al. (2000). All-cause mortality associated with physical activity during leisure time, work, sports, and cycling to work. Archive of Internal Medicine, 160, 1621–1628.
5. Arem, H., Moore, S. C., Patel, A., Hartge, P., de Gonzalez, A. B., Visvanathan, K., Campbell, P. T., Freeman, M., Weiderpass, E., Adami, H. O., Linet, M. S., Lee, I. M., & Matthews, C. E. (2015). Leisure time physical activity and mortality: a detailed pooled analysis of the dose-response relationship. Journal of American Medical Association, 175, 959–967.