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首页> 外文期刊>Journal of athletic training >Frequency and location of head impact exposures in individual collegiate football players.
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Frequency and location of head impact exposures in individual collegiate football players.

机译：个人大学足球运动员头部冲击曝光的频率和位置。

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CONTEXT: Measuring head impact exposure is a critical step toward understanding the mechanism and prevention of sport-related mild traumatic brain (concussion) injury, as well as the possible effects of repeated subconcussive impacts. OBJECTIVE: To quantify the frequency and location of head impacts that individual players received in 1 season among 3 collegiate teams, between practice and game sessions, and among player positions. DESIGN: Cohort study. SETTING: Collegiate football field. PATIENTS OR OTHER PARTICIPANTS: One hundred eighty-eight players from 3 National Collegiate Athletic Association football teams. INTERVENTION(S): Participants wore football helmets instrumented with an accelerometer-based system during the 2007 fall season. MAIN OUTCOME MEASURE(S): The number of head impacts greater than 10 g and location of the impacts on the player's helmet were recorded and analyzed for trends and interactions among teams (A, B, or C), session types, and player positions using Kaplan-Meier survival curves. RESULTS: The total number of impacts players received was nonnormally distributed and varied by team, session type, and player position. The maximum number of head impacts for a single player on each team was 1022 (team A), 1412 (team B), and 1444 (team C). The median number of head impacts on each team was 4.8 (team A), 7.5 (team B), and 6.6 (team C) impacts per practice and 12.1 (team A), 14.6 (team B), and 16.3 (team C) impacts per game. Linemen and linebackers had the largest number of impacts per practice and per game. Offensive linemen had a higher percentage of impacts to the front than to the back of the helmet, whereas quarterbacks had a higher percentage to the back than to the front of the helmet. CONCLUSIONS: The frequency of head impacts and the location on the helmet where the impacts occur are functions of player position and session type. These data provide a basis for quantifying specific head impact exposure for studies related to understanding the biomechanics and clinical aspects of concussion injury, as well as the possible effects of repeated subconcussive impacts in football.
机译：背景信息：测量头部冲击暴露是了解体育相关的轻度创伤性大脑（脑震荡）损伤的机制和预防的关键步骤，以及重复的次要冲击的可能影响。目的：量化头部影响的频率和位置，即在3个组合团队，在实践和游戏会议之间以及球员职位之间以及球员职位之间获得的一个赛季。设计：队列研究。环境：大学足球场。患者或其他参与者：来自3个国家大学运动会足球队的一百八十八名球员。干预：参与者在2007年秋季期间穿着基于加速度计的系统的橄榄球头盔。主要结果措施：记录和分析团队（A，B，或C），会议类型和播放器职位之间的趋势和互动，记录和分析了大于10克的头部影响数量和对玩家头盔的影响的位置使用Kaplan-Meier生存曲线。结果：收到的影响球员总数是由团队，会话类型和播放器职位分发和多种多样的。每个团队的单个玩家的最大头部影响数为1022（团队A），1412（B）和1444（C组）。每个团队的头部影响的中位数为4.8（团队A），7.5（B）和6.6（C队）每种练习的影响，12.1（A），14.6（B）和16.3（团队C）每场比赛的影响。 Linemen和LineBackers每种练习和每场比赛都有最多的影响。令人反感的线民对前面的撞击百分比比到头盔的背面有更高的影响，而四分卫则与背部的百分比高于头盔的前部。结论：头部冲击的频率和头盔上的位置是玩家位置和会话类型的函数。这些数据提供了量化特定的头部冲击暴露的基础，用于了解脑震荡损伤的生物力学和临床方面的研究，以及重复的次要冲击在足球中的可能影响。

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