TY  - JOUR
PY  - 2016//
TI  - The ability of American football helmets to manage linear acceleration with repeated high-energy impacts
JO  - Journal of athletic training
A1  - Cournoyer, Janie
A1  - Post, Andrew
A1  - Rousseau, Philippe
A1  - Hoshizaki, Blaine
SP  - 258
EP  - 263
VL  - 51
IS  - 3
N2  - CONTEXT:  Football players can receive up to 1400 head impacts per season, averaging 6.3 impacts per practice and 14.3 impacts per game. A decrease in the capacity of a helmet to manage linear acceleration with multiple impacts could increase the risk of traumatic brain injury. <br><br>OBJECTIVE:  To investigate the ability of football helmets to manage linear acceleration with multiple high-energy impacts. <br><br>DESIGN:  Descriptive laboratory study. SETTING:  Laboratory. MAIN OUTCOME MEASURE(S):  We collected linear-acceleration data for 100 impacts at 6 locations on 4 helmets of different models currently used in football. Impacts 11 to 20 were compared with impacts 91 to 100 for each of the 6 locations. <br><br>RESULTS:  Linear acceleration was greater after multiple impacts (91-100) than after the first few impacts (11-20) for the front, front boss, rear, and top locations. However, these differences are not clinically relevant as they do not affect the risk for head injury. <br><br>CONCLUSIONS:  American football helmet performance deteriorated with multiple impacts, but this is unlikely to be a factor in head-injury causation during a game or over a season.<p />  <p>Language: en</p>
LA  - en
SN  - 1062-6050
UR  - http://dx.doi.org/10.4085/1062-6050-51.4.08
ID  - ref1
ER  -