Sources
Gao, Z., Lee, A. M., & Harrison, L. (2008). Understanding students' motivation in sport and physical education: From the expectancy-value model and self-efficacy theory perspectives. Quest, 60(2), 236-254. doi:10.1080/00336297.2008.10483579
Pedersen, Vorup, Nistrup, Wikman, Alstrom, Melcher, . . . Bangsbo. (2017). Effect of team sports and resistance training on physical function,ï¿‚ quality of life, and motivation in older adults. Scandinavian Journal of Medicine and Science, 27(8), 852- 864.
Vancampfort, D., Stubbs, B., Richards, J., Ward, P. B., Firth, J., Schuch, F. B., & Rosenbaum, S. (2017). Physical fitness in people with posttraumatic stress disorder: A systematic review Taylor & Francis. doi:10.1080/09638288.2016.1226412
Waite-Jones, J., Hale, C., & Lee, H. (2013). Psychosocial effects of tai chi exercise on people with rheumatoid arthritis. Journal of Clinical Nursing, 22(21-22), 3053-3061. doi:10.1111/jocn.12327
Mandy Oaklander. (2016, Sep 12,). The new science of exercise. Health, Retrieved from http://time.com/4475628/the-new-science-of-exercise/