http://parkourconditioning.com/parkour-injuries-survey/
This is a link to results of a survey by Ben Musholt about injuries during parkour.
http://www.ski-injury.com/specific-sports/snowboard-injuries
This one is for snowboarding and skiing.
http://www.nrs.com/safety_tips/whitewaterfatalities.asp
Different whitewater sports.
http://www.diversalertnetwork.org/default.aspx?a=news&id=904
Scuba Diving injury and death.
http://labeeb21.wordpress.com/2011/07/22/injuries-involved-with-extreme-sports/
This link shows stats and preventions with three different sports.
http://xgames.espn.go.com/surfing/article/7796297/examining-most-common-injuries-surfers-suffer-from
This shows common surfing injuries and and to prevent serious injury.
http://www.dropzone.com/fatalities/
Skydiving fatalities.
http://www.climbingbusinessjournal.com/indoor-climbing-injury-stats/
Rock Climbing injuries.