Lin Ming-An, Meng Ling-Fu, Ouyang Yuan, Chan Hsiao-Lung, Chang Ya-Ju, Chen Szi-Wen, Liaw Jiunn-Woei
Faculty of Computer and Software Engineering, Huaiyin Institute of Technology, Huaian, Jiang-Su, China.
Department of Occupational Therapy and Graduate Institute of Behavioral Science, School of Medicine, Chang Gung University, Taoyuan, Taiwan.
BMC Sports Sci Med Rehabil. 2021 Mar 19;13(1):27. doi: 10.1186/s13102-021-00252-w.
EEGs are frequently employed to measure cerebral activations during physical exercise or in response to specific physical tasks. However, few studies have attempted to understand how exercise-state brain activity is modulated by exercise intensity.
Ten healthy subjects were recruited for sustained cycle ergometer exercises at low and high resistance, performed on two separate days a week apart. Exercise-state EEG spectral power and phase-locking values (PLV) are analyzed to assess brain activity modulated by exercise intensity.
The high-resistance exercise produced significant changes in beta-band PLV from early to late pedal stages for electrode pairs F3-Cz, P3-Pz, and P3-P4, and in alpha-band PLV for P3-P4, as well as the significant change rate in alpha-band power for electrodes C3 and P3. On the contrary, the evidence for changes in brain activity during the low-resistance exercise was not found.
These results show that the cortical activation and cortico-cortical coupling are enhanced to take on more workload, maintaining high-resistance pedaling at the required speed, during the late stage of the exercise period.
脑电图（EEG）常用于测量体育锻炼期间或对特定体育任务作出反应时的大脑激活情况。然而，很少有研究试图了解运动强度如何调节运动状态下的大脑活动。
招募了10名健康受试者，在相隔一周的两天分别进行低阻力和高阻力的持续自行车测力计运动。分析运动状态下的脑电图频谱功率和锁相值（PLV），以评估运动强度对大脑活动的调节作用。
高阻力运动在踏板运动的早期到后期，电极对F3-Cz、P3-Pz和P3-P4的β波段PLV，以及P3-P4的α波段PLV均产生了显著变化，电极C3和P3的α波段功率也有显著变化率。相反，未发现低阻力运动期间大脑活动有变化的证据。
这些结果表明，在运动后期，为了以所需速度维持高阻力蹬踏，大脑皮层激活和皮层-皮层耦合增强，以承担更多工作量。
