The number of sport-related concussions is highest in high-school aged
athletes, but the number among younger athletes is significant and on the
rise, according to a first-of-its-kind study reported in the journal Pediatrics. The number of concussions among athletes ages 7 to 13 in the top five team sports (football, basketball, baseball, soccer and ice hockey) doubled over a four year period, and the concussion rates among those playing ice hockey and football are eight- to ten-times higher than the overall rate.