NCAA Injury Surveillance Center, ten percent of all college football players sustain brain injuries, which is an average of 1,364 per year. The growing awareness that concussions can have serious long-term effects has led the NCAA Football Rules Committee to adopt harsher penalties for targeting on the field, and every school is required to have a concussion-management plan. Of course, football is a collision sport, with large bodies forcefully knocking into one another. Football is the most popular sport in the nation for high school boys, according to the National Federation of State High School Associations, with 1.1 million boys playing. All those athletes need to practice their skills, and perhaps because practices happen more often than games, there are more opportunities to get hurt. Whatever the reason, high school and college football players are more likely to suffer a concussion during practices than in a game (58 percent vs. 42 percent). Overall, college students had the highest rate of concussions during games, with 3.74 per 1,000 games compared to 2.01 for those in high school and 2.38 for youths. High school students had the highest rates during practices.