TY  - JOUR
PY  - 2018//
TI  - Head impact exposure in practices correlates with exposure in games for youth football players
JO  - Journal of applied biomechanics
A1  - Bellamkonda, Srinidhi
A1  - Woodward, Samantha J.
A1  - Campolettano, Eamon
A1  - Gellner, Ryan
A1  - Kelley, Mireille E.
A1  - Jones, Derek A.
A1  - Genemaras, Amaris
A1  - Beckwith, Jonathan G.
A1  - Greenwald, Richard M.
A1  - Maerlender, Arthur C.
A1  - Rowson, Steven
A1  - Duma, Stefan M.
A1  - Urban, Jillian E.
A1  - Stitzel, Joel D.
A1  - Crisco, Joseph J.
SP  - 354
EP  - 360
VL  - 34
IS  - 5
N2  - This study aimed to compare head impact exposures between practices and games in football players ages 9 to 14, who account for approximately 70% of all football players in the US. Over a period of two seasons, 136 players were enrolled from three youth programs and 49,847 head impacts were recorded from 345 practices and 137 games. During the study, individual players sustained a median of 211 impacts per season, with a maximum of 1226 impacts. Players sustained 50<sup>th</sup> (95<sup>th</sup>) percentile peak linear acceleration of 18.3 (46.9) g, peak rotational acceleration of 1305.4 (3316.6) rad·s<sup>-2</sup>, and HITsp of 13.7 (24.3), respectively. Overall, players with a higher frequency of head impacts at practices recorded a higher frequency of head impacts at games (p < 0.001, r<sup>2</sup> = 0.52) and players who sustained a greater average magnitude of head impacts during practice also recorded a greater average magnitude of head impacts during games (p < 0.001). The youth football head impact data quantified in this study provides valuable insight into the player exposure profile, which should serve as a key baseline in efforts to reduce injury.    Keywords: American football <p />  <p>Language: en</p>
LA  - en
SN  - 1065-8483
UR  - http://dx.doi.org/10.1123/jab.2017-0207
ID  - ref1
ER  -