Department of Mechanical Engineering, Purdue University, West Lafayette, Indiana.
Department of Biomedical Engineering, Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana.
Clin J Sport Med. 2021 Sep 1;31(5):e245-e250. doi: 10.1097/JSM.0000000000000778.
The goal of this pilot study was to evaluate the number of head acceleration events (HAEs) based on position, play type, and starting stance.
Prospective cohort study.
Postcollegiate skill development camp during practice sessions and 1 exhibition game.
Seventy-eight male adult North American football athletes.
A position was assigned to each participant, and plays in the exhibition game were separated by play type for analysis. During the exhibition game, video data were used to determine the effects of the starting position ("up" in a 2-point stance or "down" in a 3- or 4-point stance) on the HAEs experienced by players on the offensive line.
Peak linear acceleration and number of HAEs greater than 20 g (g = 9.81 m/s2) were measured using an xPatch (X2 Biosystems, Seattle, WA).
Four hundred thirty-seven HAEs were recorded during practices and 272 recorded during the exhibition game; 98 and 52 HAEs, the greatest number of HAEs by position in the game, were experienced by the offensive and defensive linemen, respectively. Linebackers and tight ends experienced high percentages of HAEs above 60 g. Offensive line players in a down stance had a higher likelihood of sustaining a HAE than players in an up stance regardless of the type of play (run vs pass).
Changing the stance of players on the offensive line and reducing the number of full-contact practices will lower HAEs.
本初步研究旨在根据位置、比赛类型和起始姿势评估头部加速度事件 (HAE) 的数量。
前瞻性队列研究。
练习期间的大学后技能发展营和 1 场表演赛。
78 名男性北美足球运动员。
为每位参与者分配一个位置，并根据比赛类型对表演赛中的比赛进行分离以进行分析。在表演赛中，使用视频数据确定起始位置（2 分势的“向上”或 3 分势或 4 分势的“向下”）对进攻线上球员经历的 HAE 的影响。
使用 xPatch（X2 Biosystems，西雅图，WA）测量峰值线性加速度和大于 20 g（g = 9.81 m/s2）的 HAE 数量。
在练习中记录了 437 次 HAE，在表演赛中记录了 272 次；在比赛中，遭遇 HAE 数量最多的是进攻和防守线卫，分别为 98 和 52 次。线卫和紧身端遭遇高于 60 g 的 HAE 的百分比很高。无论比赛类型（跑动与传球）如何，处于向下姿势的进攻线球员比处于向上姿势的球员更有可能遭受 HAE。
改变进攻线球员的姿势并减少全接触练习的次数将降低 HAE。
