It’s not like anyone thought head injuries were good for people, but the long term effects of concussions has researchers, coaches, and doctors concerned about the extra risks of some popular sports. Hosted by: Olivia Gordon ---------- Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kelly Landrum Jones, Sam Lutfi, Kevin Knupp, Nicholas Smith, D.A. Noe, alexander wadsworth, سلطا الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick Merrithew, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Justin Lentz ---------- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Instagram: instagram.com/thescishow ---------- Sources: www.profootballhof.com/football-history/pro-footballs-birth-certificate/ www.ncbi.nlm.nih.gov/books/NBK185339/ jamanetwork.com/journals/jamaneurology/article-abstract/2654232?redirect=true n.neurology.org/content/neurology/48/3/581.full.pdf www.pbs.org/wgbh/pages/frontline/sports/league-of-denial/timeline-the-nfls-concussion-crisis/ thejns.org/doi/abs/10.3171/foc.2006.21.4.13%40col.2012.116.issue-6?journalCode=col www.sciencedaily.com/releases/2000/05/000505064356.htm www.bu.edu/cte/about/frequently-asked-questions/ www.ncbi.nlm.nih.gov/pmc/articles/PMC34454/ www.bostonglobe.com/metro/2018/01/18/cte-can-begin-soon-after-head-injury-even-teens-study-finds/yApExpCyyiESvgOYviI6NK/story.html?s_campaign=bostonglobe%3Asocialflow%3Atwitter abcnews.go.com/Nightline/cheerleading-dangerous-sport-young-girls/story?id=9473938 www.nytimes.com/2007/03/31/sports/31cheerleader.html www.nationwidechildrens.org/news-room-articles/cheerleading-injuries-found-to-be-significant-source-of-injury-to-girls?contentid=46084 aacca.org/safety-rules/ www.sbs.com.au/topics/science/humans/article/2016/08/09/what-happens-gymnasts-body-it-ages www.ncbi.nlm.nih.gov/pmc/articles/PMC3751410/ www.jpeds.com/article/S0022-3476(00)70094-1/fulltext www.karger.com/Article/Pdf/84282 www.nof.org/patients/what-is-osteoporosis/ www.arthritis.org/about-arthritis/types/osteoarthritis/ www.cdc.gov/arthritis/data_statistics/cost.htm www.mayoclinic.org/diseases-conditions/sprained-ankle/symptoms-causes/syc-20353225 www.mayoclinic.org/diseases-conditions/tendinitis/symptoms-causes/syc-20378243 www.mayoclinic.org/diseases-conditions/stress-fractures/symptoms-causes/syc-20354057 www.nytimes.com/2016/04/10/opinion/sunday/baseball-is-injuring-too-many-kids.html?mtrref=www.google.com&assetType=opinion grantland.com/features/comparing-mortality-rates-football-baseball/ www.ncbi.nlm.nih.gov/pubmed/15262641 bjsm.bmj.com/content/48/4/287.full?sid=bd122323-896f-4b27-afe1-d37beeed4a8e pediatrics.aappublications.org/content/early/2016/08/25/peds.2016-2148 journals.sagepub.com/doi/full/10.1177/0363546517710213 www.npr.org/sections/health-shots/2017/07/25/539334374/student-athletes-who-specialize-early-are-injured-more-often-study-finds www.ncbi.nlm.nih.gov/pmc/articles/PMC3658407/ www.nytimes.com/2017/09/29/health/sports-injuries-football-yale.html www.bbc.com/news/health-33478629 www.ncbi.nlm.nih.gov/pmc/articles/PMC2953356/ kidshealth.org/en/teens/runners-knee.html thesportjournal.org/article/sports-equipment-and-technology/ engineeringsport.co.uk/2012/08/09/what-is-sports-engineering/ www.washingtonpost.com/news/early-lead/wp/2017/11/22/theres-a-new-safest-football-helmet-for-sale-now-can-anyone-afford-it/?utm_term=.d8b63bf2e886 www.sciencedirect.com/science/article/pii/S1877065716300069 natajournals.org/doi/10.4085/1062-6050-51.4.05 www.tandfonline.com/doi/abs/10.1080/00336297.2017.1386114 Images: en.wikipedia.org/wiki/File:Chronic_Traumatic_Encephalopathy.png www.thinkstockphotos.com