Radford University.
Chapman University.
Res Q Exerc Sport. 2022 Dec;93(4):788-794. doi: 10.1080/02701367.2021.1921103. Epub 2021 Nov 2.
: Fatigue may mimic suboptimal brain functioning seen after a concussion and lead to false-positive King-Devick (K-D) scores and decreased balance. The purpose of this study was to investigate if whole-body fatigue has an effect on K-D scores or postural sway. : A total of 38 healthy participants (20 females; age = 23.5 ± 2.63 y; height = 170 ± 0.1 cm; mass = 75.2 ± 10.3 kg) volunteered for the study. Participants completed the King-Devick (K-D) test and the modified Clinical Test of Sensory Interaction of Balance (mCTSIB) on the Biodex BioSway Portable Balance System prior to and immediately following the completion of a fatigue protocol on a Concept2 Rower. : Half of the participants demonstrated a positive K-D test post-fatigue. Balance scores were poorer post-fatigue. No difference was found between participants based on history of concussion. Among the participants that had a positive post-fatigue K-D test, 71% had also a worse composite sway index score (χ = 6.3, = .02). : Whole-body fatigue may negatively impact a person's ability to perform the K-D test and balance assessments. It is recommended that the athlete is allowed a period of time to accommodate for the acute effects of fatigue before administering these assessments following a suspected concussion.
可能会出现疲劳，类似于脑震荡后出现的脑功能不佳，并导致 King-Devick（K-D）测试结果呈假阳性和平衡能力下降。本研究旨在调查全身疲劳是否会对 K-D 评分或姿势摆动产生影响。
共有 38 名健康参与者（20 名女性；年龄=23.5±2.63 岁；身高=170±0.1cm；体重=75.2±10.3kg）自愿参加了这项研究。参与者在完成 Concept2 划船机上的疲劳方案之前和之后，立即在 Biodex BioSway 便携式平衡系统上完成了 King-Devick（K-D）测试和改良的临床平衡感觉相互作用测试（mCTSIB）。
一半的参与者在疲劳后出现 K-D 测试阳性。疲劳后平衡评分更差。基于脑震荡史，参与者之间没有差异。在疲劳后 K-D 测试呈阳性的参与者中，有 71%的人复合摆动指数评分也更差（χ=6.3，=.02）。
全身疲劳可能会对人的 K-D 测试和平衡评估能力产生负面影响。建议在疑似脑震荡后进行这些评估之前，让运动员有一段时间来适应疲劳的急性影响。
