Department of Kinesiology and Applied Physiology, University of Delaware, Newark.
Interdisciplinary Program in Biomechanics and Movement Science, University of Delaware, Newark.
J Athl Train. 2019 May;54(5):527-533. doi: 10.4085/1062-6050-200-18. Epub 2019 Apr 1.
Postconcussion deficits in neurocognitive performance and postural control may persist at the time of return to sport participation. How these deficits, if present, affect athletic performance is largely unknown, with prior studies showing mixed results.
To evaluate postconcussion National Hockey League player performance using advanced hockey metrics over short- (5 games), medium- (10 games), and long-term (remainder of the season) seasonal performance.
Retrospective cohort study.
National Hockey League players who sustained a sport-related concussion (SRC; n = 93) and returned during the same season and players (n = 51) who missed time for non-injury-related reasons.
MAIN OUTCOME MEASURE(S): Six performance metrics were used: (1) points per 60 minutes, (2) Corsi percentage, (3) personal Fenwick shooting percentage, (4) scoring chances per 60 minutes, (5) penalty difference, and (6) PDO (not an acronym but sometimes referred to as SVSP% [save percentage shooting percentage]). Performance was compared using 2 (group) × 2 (time) repeated-measures analyses of variance for 3 time windows: (1) ±5 games, (2) ±10 games, and (3) the remainder of the season postconcussion. Alpha values were set at a conservative .01 to account for the lack of independence among dependent variables.
No significant interactions were present for any of the 6 dependent variables at any of the 3 time windows. Overall, none of the secondary variables differed.
Using advanced, sport-specific metrics, we found that National Hockey League players did not display worse seasonal performance during 3 postinjury time frames after they sustained an SRC. Whereas laboratory studies have identified lingering neurologic deficits after concussion, our results suggest that these deficits, if present, either do not translate to worse athletic performance or were not captured by these 44 metrics. Further, prospective efforts are needed to accurately quantify performance after SRC among professional hockey players.
在重返运动参与时，神经认知表现和姿势控制的脑震荡后缺陷可能仍然存在。如果存在这些缺陷，它们如何影响运动表现在很大程度上是未知的，先前的研究结果喜忧参半。
使用高级曲棍球指标评估脑震荡后国家冰球联盟（NHL）球员的表现，这些指标涵盖短期（5 场比赛）、中期（10 场比赛）和长期（本季剩余时间）的赛季表现。
回顾性队列研究。
遭受运动相关脑震荡（SRC）并在同一赛季复出的 NHL 球员（n = 93）和因非伤病原因缺阵的球员（n = 51）。
使用 6 项表现指标：（1）每 60 分钟得分，（2）Corsi 百分比，（3）个人 Fenwick 射门百分比，（4）每 60 分钟得分机会，（5）罚差分，以及（6）PDO（不是首字母缩写词，但有时称为 SVSP%[射门百分比的扑救百分比]）。使用 2（组）×2（时间）重复测量方差分析比较表现，3 个时间窗口为：（1）±5 场比赛，（2）±10 场比赛，以及（3）脑震荡后本季剩余时间。由于缺乏依赖变量之间的独立性，alpha 值设定为保守的 0.01。
在 3 个时间窗口的任何一个时间窗口，6 个因变量都没有出现显著的交互作用。总体而言，没有任何次要变量存在差异。
使用高级、特定于运动的指标，我们发现 NHL 球员在遭受 SRC 后的 3 个受伤后时间框架内，在整个赛季的表现并没有更差。虽然实验室研究已经确定了脑震荡后存在持续的神经认知缺陷，但我们的结果表明，如果存在这些缺陷，它们要么不会转化为更差的运动表现，要么没有被这 44 项指标捕捉到。此外，需要进行前瞻性研究，以准确量化职业曲棍球运动员脑震荡后的表现。
