Associate Professor of Exercise Science, Georgia Gwinnett College, School of Science & Technology, Lawrenceville, GA, USA.
Research Psychologist, United States Army Research Institute of Environmental Medicine, Natick, MA, USA.
J Sports Sci. 2022 Mar;40(5):509-517. doi: 10.1080/02640414.2021.2001175. Epub 2021 Dec 20.
Head impacts and neurocognition were quantified in 27 intercollegiate male boxers engaged in two, two-minute sparring rounds. Head impacts were measured using Instrumented Boxing Headgear (IBH). Pre and post-sparring neurocognitive performance was compared using two computerized neuropsychological test batteries (CNTs): Immediate Post-concussion Assessment and Cognitive Testing (ImPACT™) and Automated Neuropsychological Assessment Metrics - Military Battery (ANAM4® MIL). An average of 27.63 ± 17.87 impacts above the 9.6 g IBH threshold were recorded per boxer, with average peak linear acceleration of 23.48 ± 15.20 g and average peak rotational acceleration of 1761.40 ± 1064.34 rad/s. Small, but measurable declines in delayed memory and improvement in response time from pre- to post-bout were noted. Number of impacts and concussion history predicted degraded memory performance. This is a unique quantification of head impacts in collegiate boxing, which were similar in frequency and location, but lower in magnitude as compared to amateur boxing. Improved understanding of impact kinematics may enhance safety in boxing and other contact sports. Subtle post-bout decrements in delayed memory performance and mild improvement in response time reinforce prior research and provide evidence of congruence in our two CNT assessments, which may facilitate comparisons of outcomes across settings utilizing these tests.
对 27 名参与两次两分钟拳击对练的大学生男性拳击手的头部撞击和神经认知进行了量化。使用 Instrumented Boxing Headgear（IBH）测量头部撞击。使用两个计算机化神经心理学测试电池（CNTs）比较赛前和赛后的神经认知表现：即时脑震荡评估和认知测试（ImPACT™）和自动神经心理评估指标-军事电池（ANAM4® MIL）。每名拳击手的平均头部撞击次数为 27.63 ± 17.87 次，超过了 9.6 g 的 IBH 阈值，平均峰值线性加速度为 23.48 ± 15.20 g，平均峰值旋转加速度为 1761.40 ± 1064.34 rad/s。注意到从赛前到赛后，延迟记忆略有下降，反应时间有所改善。撞击次数和脑震荡史预测记忆表现下降。这是对大学拳击头部撞击的独特量化，其撞击频率和位置相似，但幅度较低。更好地了解撞击运动学可能会提高拳击和其他接触性运动的安全性。赛后延迟记忆表现轻微下降和反应时间略有改善，这强化了先前的研究，并为我们的两个 CNT 评估提供了一致性的证据，这可能有助于利用这些测试在不同环境下比较结果。
