Beckwith Jonathan G, Chu Jeffrey J, Greenwald Richard M
Simbex, Lebanon, NH, USA.
J Appl Biomech. 2007 Aug;23(3):238-44. doi: 10.1123/jab.23.3.238.
Although the epidemiology and mechanics of concussion in sports have been investigated for many years, the biomechanical factors that contribute to mild traumatic brain injury remain unclear because of the difficulties in measuring impact events in the field. The purpose of this study was to validate an instrumented boxing headgear (IBH) that can be used to measure impact severity and location during play. The instrumented boxing headgear data were processed to determine linear and rotational acceleration at the head center of gravity, impact location, and impact severity metrics, such as the Head Injury Criterion (HIC) and Gadd Severity Index (GSI). The instrumented boxing headgear was fitted to a Hybrid III (HIII) head form and impacted with a weighted pendulum to characterize accuracy and repeatability. Fifty-six impacts over 3 speeds and 5 locations were used to simulate blows most commonly observed in boxing. A high correlation between the HIII and instrumented boxing headgear was established for peak linear and rotational acceleration (r2= 0.91), HIC (r2 = 0.88), and GSI (r2 = 0.89). Mean location error was 9.7 +/- 5.2 masculine. Based on this study, the IBH is a valid system for measuring head acceleration and impact location that can be integrated into training and competition.
尽管多年来一直在研究体育运动中脑震荡的流行病学和力学原理，但由于在现场测量撞击事件存在困难，导致轻度创伤性脑损伤的生物力学因素仍不清楚。本研究的目的是验证一种仪器化拳击头盔（IBH），该头盔可用于测量比赛期间的撞击严重程度和位置。对仪器化拳击头盔的数据进行处理，以确定头部重心处的线性和旋转加速度、撞击位置以及撞击严重程度指标，如头部损伤标准（HIC）和加德严重程度指数（GSI）。将仪器化拳击头盔安装在Hybrid III（HIII）头部模型上，并用加权摆锤进行撞击，以表征其准确性和可重复性。使用3种速度和5个位置的56次撞击来模拟拳击比赛中最常见的打击。在峰值线性和旋转加速度（r2 = 0.91）、HIC（r2 = 0.88）和GSI（r2 = 0.89）方面，HIII与仪器化拳击头盔之间建立了高度相关性。平均位置误差为9.7 +/- 5.2毫米。基于本研究，IBH是一种用于测量头部加速度和撞击位置的有效系统，可集成到训练和比赛中。
