Fewer than 4 percent of youth players surveyed in a USA Football-sanctioned study suffered concussions in the 10 leagues examined.
Most injuries among nearly 2,000 players on more than 100 teams in six states were minor, with the youngsters returning to play the same day. More than 90 percent of the players did not suffer any injuries, and of those who did, the most common were contusions (35 percent) and ligament sprains (15 percent).
No catastrophic head, neck or heat-related injuries were reported.
Indianapolis-based Datalys Center for Sports Injury Research and Prevention conducted the study in Arizona, Indiana, Massachusetts, Ohio, South Carolina and West Virginia.