Concussions in High School Sports.

Between the 1997-98 and 2007-08 school years, concussion rates increased across the board in most high school sports. While football accounts for more than half of all concussions and has the highest incident rate (.6 per 10,000 athletes), girl’s soccer had the most concussions among female sports and the 2nd highest incident rate among all sports at .35 per 10,000 athletes.

The American Journal of Sports Medicine, January 2011