Young Tyler J, Daniel Ray W, Rowson Steven, Duma Stefan M
School of Biomedical Engineering and Sciences, Virginia Tech-Wake Forest University, Blacksburg, Virginia.
Clin J Sport Med. 2014 Sep;24(5):416-21. doi: 10.1097/JSM.0000000000000055.
To provide data describing the head impact exposure of 7- to 8-year-old football players.
Head impact data were collected from 19 players over the course of 2 seasons using helmet-mounted accelerometer arrays.
Data were collected from 2 youth football teams in Blacksburg, VA, spanning 2 seasons.
A total of 19 youth football players aged 7-8 years.
Type of session (practice or game) and the player's experience.
Head impact frequency, acceleration magnitude, and impact location for games, practices, and the season as a whole were measured.
The average instrumented player sustained 9 ± 6 impacts per practice, 11 ± 11 impacts per game, and 161 ± 111 impacts per season. The average instrumented player had a median impact of 16 ± 2 g and 686 ± 169 rad/s and a 95th percentile impact of 38 ± 13 g and 2052 ± 664 rad/s throughout a season. Impacts of 40 g or greater tended to occur more frequently in practices than in games, and practices had a significantly higher 95th percentile impact magnitude than games (P = 0.023). Returning players had significantly more impacts than first time players (P = 0.007).
These data are a further step toward developing effective strategies to reduce the incidence of concussion in youth football and have applications toward youth-specific football helmet designs.
提供有关7至8岁足球运动员头部撞击暴露情况的数据。
在两个赛季的过程中，使用头盔安装的加速度计阵列从19名球员收集头部撞击数据。
数据收集自弗吉尼亚州布莱克斯堡的两支青年足球队，涵盖两个赛季。
共有19名7至8岁的青年足球运动员。
训练课程类型（训练或比赛）以及球员的经验。
测量比赛、训练以及整个赛季的头部撞击频率、加速度大小和撞击位置。
配备仪器的球员平均每次训练遭受9±6次撞击，每场比赛遭受11±11次撞击，每个赛季遭受161±111次撞击。配备仪器的球员在整个赛季中，撞击的中位数为16±2 g和686±169 rad/s，第95百分位数的撞击为38±13 g和2052±664 rad/s。40 g或更高的撞击在训练中比在比赛中更频繁发生，并且训练中第95百分位数的撞击强度明显高于比赛（P = 0.023）。回归球员比首次参赛球员受到的撞击明显更多（P = 0.007）。
这些数据是朝着制定有效策略以减少青年足球中脑震荡发生率迈出的又一步，并且对针对青少年的足球头盔设计有应用价值。
