1. The Aspen Institute Project Play. Youth sports facts: participation rates. Accessed August 21, 2022. https://www.aspenprojectplay.org/youth-sports/facts/participation-rates
2. Benefits of youth sports. Accessed August 21, 2022. https://health.gov/sites/default/files/2020-09/YSS_Report_OnePager_2020-08-31_web.pdf
3. National Collegiate Athletic Association. NCAA Sports Sponsorship and Participation Rates Report. Accessed August 21, 2022. https://ncaaorg.s3.amazonaws.com/research/sportpart/2021RES_SportsSponsorshipParticipationRatesReport.pdf
4. Epidemiology of sport-related concussion;Pierpoint;Clin Sports Med,2021
5. Cerebral blood flow alterations in acute sport-related concussion;Wang;J Neurotrauma,2016