1. National Federation of State High School Associations. 2017–2018 High School Athletics Participation Survey results [Internet]. [cited 2018 Aug 29]. Available from: http://www.nfhs.org/ParticipationStatistics/PDF/2017-18%20High%20School%20Athletics%20Participation%20Survey.pdf
2. Cricket Network. Cricket becomes Australia’s no.1 participation sport [Internet]. cricket.com.au . [cited 2018 Oct 20]. Available from: https://www.cricket.com.au/news/cricket-australia-census-participation-numbers-women-men-children-james-sutherland/2016-08-23
3. International Olympic Committee. 8 things you didn’t know about handball [Internet]. Athlete365. 2016 [cited 2018 Oct 25]. Available from: https://www.olympic.org/athlete365/news/8-things-you-didnt-know-about-handball/
4. World Health Organization. WHO |Adolescent health [Internet]. WHO. [cited 2018 Jun 2]. Available from: http://www.who.int/topics/adolescent_health/en/
5. Pierpoint LA, Williams CM, Fields SK, Comstock RD. Epidemiology of injuries in United States high school track and field: 2008-2009 through 2013-2014. Am J Sports Med. 2016;44:1463–8.