The authors calculated rates per athletic exposure, defined as a practice or competition. Overall, high school athletes experienced concussions at a rate of 4.17 per 10,000 exposures. Football had the highest rate per 10,000 exposures at 10.4 followed by girls’ soccer at 8.19 and boys’ ice hockey at 7.69.
According to a study done by the Sports Concussion Clinic, Division of Sports Medicine, Children’s Hospital Boston, football accounts for just under 57% (shown to the right in the pie chart) of concussions in high school athletes. These rates of concussions are alarmingly high for high school in particular and given that football is also one of the most popular sports played in America the volume of high school athletes who experience concussions is also extremely high.
Fewer than 10% of youth football related concussions involve losing consciousness for any period of time. 27. 85% of those who suffer a concussion will suffer from a headache. Up to 80% of concussions will also cause dizziness. 28. A football player may receive up to 1,500 blows to the head during a season. 29.
Overall, the data showed that the three sports with the highest concussion rates were: Boys’ football, with 10.4 concussions per 10,000 athlete exposures. Girls’ soccer, with 8.19 per 10,000 athlete exposures. Boys’ ice hockey, with 7.69 per 10,000 athlete exposures.
CHR reduces the weekly probability of defensive player concussions from 29 to 32%.  It reduces the probability of all head and neck injuries by 34%. The downside of this rule is that players are more likely to tackle the lower body, which increases risk of serious lower body injuries.
Girls had a higher rate of concussion (0.36 concussions per 1000 A-Es) than boys (0.22 concussions per 1000 A-Es) (RR = 1.68, 95% CI = 1.08, 2.60, P = .03) (Table 1), and concussions represented a greater proportion of total injuries among girls (15.1%, n = 29 167) than boys (9.4%, n = 20 929) (PR = 1.61, 95% CI = 1.59, 1.64, P < .01). The risk factors for concussion in soccer differed significantly by sex.
Head injury. According to HealthResearchFunding.org, concussion rates for children under age 19 who play tackle football have doubled over the last decade, most occurring during practices. Concussions can occur with a blow to the head through helmet to helmet contact, and if undiagnosed and left untreated can lead to permanent brain damage.
Ice hockey had the second highest concussion rate with 1.20 concussions per 1, 000 AE. American football came in third (0.53 concussions/1000 AE). See the full list below: Rugby (4.18/1,000 AE) Ice hockey (1.20/1,000 AE) American football (0.53/1,000 AE) Lacrosse (0.24/1,000 AE) Football (or soccer) (0.23/1,000 AE) Wrestling (0.17/1,000 AE)