Ghorbani Mehrangiz, Ghazalian Farshad, Ebrahim Khosrow, Abednatanzi Hossein
Department of Physical Education and Sport Sciences, Faculty of Humanities and Social Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Department of Physical Education and Sport Sciences, Bijar Branch, Islamic Azad University, Bijar, Iran.
Basic Clin Neurosci. 2019 Nov-Dec;10(6):631-639. doi: 10.32598/BCN.9.10.440. Epub 2019 Nov 1.
The central-governor model explains the mechanism of endurance exercise-induced central fatigue, but high-intensity exercise-induced central fatigue has not been investigated yet. This study aimed to research how central fatigue during high-intensity intermittent pedaling alters the neural response, which results in Electroencephalography (EEG) recordings.
We assessed neural response by measuring the alternation of brainwave spectral power during an intermittent high-intensity 60-minute exercise on an ergometer cycle. The cadences were changed every 10 minutes according to intermittent pattern altering (90-120-60-120-60-90 rpm). EEG was used to analyze altering brain function. Heart Rate (HR), Blood Lactate (BL), and Rating of Perceived Exertion (RPE) were measured after the change in cadences.
HR, BL, and RPE increased at a cadence of 120 rpm compared with 60 rpm on the ergometer cycle. The spectral power of EEG, according to cadence × brainwaves, significantly increased (P<0.01) in the alpha and beta frequency ranges with a change in cadences between 60 rpm and 120 rpm. The spectral power of the EEG significantly increased (P<0.01) over the whole frequency range from rest to warming (theta: 251%, alpha: 165%, beta: 145%) and significantly reduced in theta, alpha, and beta (theta: 176%, alpha: 142%, beta: 77%) (P≤0.01).
High-intensity exercises (90 and 120 cadences) increased brain function, regardless of fatigue occurrence. High-intensity interval training (HIIT) led to altering the neural response. It would be required to investigate the usefulness of HIIT to treat some of the psychotic disorders.
中枢调控模型解释了耐力运动诱发中枢疲劳的机制，但高强度运动诱发的中枢疲劳尚未得到研究。本研究旨在探讨高强度间歇蹬踏过程中的中枢疲劳如何改变神经反应，这可通过脑电图（EEG）记录体现。
我们通过测量在测力计自行车上进行60分钟间歇高强度运动期间脑电波频谱功率的变化来评估神经反应。根据间歇模式改变（90-120-60-120-60-90转/分钟），每10分钟改变一次踏频。采用EEG分析脑功能的变化。在踏频改变后测量心率（HR）、血乳酸（BL）和自觉用力程度（RPE）。
在测力计自行车上，与60转/分钟的踏频相比，120转/分钟踏频时HR、BL和RPE升高。随着踏频在60转/分钟和120转/分钟之间变化，EEG频谱功率根据踏频×脑电波在α和β频率范围内显著增加（P<0.01）。从静息到热身，EEG频谱功率在整个频率范围内显著增加（θ波：251%，α波：165%，β波：145%），而在θ波、α波和β波中显著降低（θ波：176%，α波：142%，β波：77%）（P≤0.01）。
无论是否出现疲劳，高强度运动（90和120踏频）均会增强脑功能。高强度间歇训练（HIIT）导致神经反应改变。有必要研究HIIT在治疗某些精神疾病方面的有效性。
