American Civil Liberties Union (2020). Four myths about trans athletes debunked. https://www.aclu.org/news/lgbtq-rights/four-myths-about-trans-athletes-debunked/
American Psychological Association. (2009). Report of the Working Group on Gender Identity and Gender Variance. https://www.apa.org/pi/lgbt/resources/policy/gender-identity-report.pdf (PDF, 1.02 MB)
American Psychological Association. (2015). Guidelines for psychological practice with transgender and gender nonconforming people. American psychologist, 70 years old(9), 832-864. https://www.apa.org/practice/guidelines/transgender.pdf (PDF, 461 KB)
American Psychological Association. (2020). APA Resolution on Supporting Sexually/Gender Diverse Children and Adolescents in Schools. https://www.apa.org/about/policy/resolution-supporting-gender-diverse-children.pdf (PDF, 112 KB)
Clifton, D. (2021). Transphobic anti-sports bills are not only transphobic, they are racist. them. https://www.them.us/story/anti-trans-sports-bills-transphobic-racist
Darling, N., Caldwell, L.L., & Smith, R. (2005). Participation in extracurricular activities in the school environment and adolescent adaptation. Journal of Leisure Research, 37(1), 51-76. https://doi.org/10.1080/00222216.2005.11950040
Fredericks, JA and Eccles, JS (2006). Is out-of-school participation associated with beneficial outcomes? Concurrent and longitudinal relationships. Developmental psychology, 42(4), 698-713. https://doi:10.1037/0012-1649.42.4.698
Marsh, H. W. and Kleitman, S. (2003). School sports participation: mostly gains with little pain. Journal of Sport and Exercise Psychology, 25(2), 205-228. https://doi.org/10.1123/jsep.25.2.205
Nelson, M. C. and Gordon-Larsen, P. (2006). Physical activity and sedentary behaviors are associated with certain risk behaviors for adolescent health. Pediatrics, 117(4), 1281-1290. https://doi:10.1542/peds.2005-1692
Ortega, F.B., Ruiz, J.R., Castillo, M.J., & Sjöström, M. (2008). Physical condition in childhood and adolescence: a powerful marker of health. International Journal of Obesity, 321-11. https://doi.org/10.1038/sj.ijo.0803774
US Department of Health and Human Services (2008). 2008 Physical Activity Guidelines for Americans. https://health.gov/our-work/physical-activity/previous-guidelines/2008-physical-activity-guidelines