Chesbro Grant A, Owens Cameron, Reese Melody, DE Stefano Lisa, Kellawan J Mikhail, Larson Daniel J, Wenger Michael J, Larson Rebecca D
Department of Health & Exercise Science, University of Oklahoma, Norman, OK, USA.
Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Science Center, Oklahoma City, OK USA.
Int J Exerc Sci. 2024 Jan 1;17(1):220-234. doi: 10.70252/BEWM4588. eCollection 2024.
Electroencephalography (EEG) allows for the evaluation of real time changes in brain (electrocortical) activity during exercise. A few studies have examined changes in electrocortical activity using stationary cycling, but the findings have been mixed. Some of these studies have found increases in brain activity following exercise, while others have found decreases in brain activity following exercise. Hence, it is of importance to identify post-exercise changes in brain activity. Sixteen healthy, untrained subjects (8 males; 8 females) participated in the study. All 16 participants performed a graded exercise test (GXT) to volitional exhaustion on an upright cycle ergometer. Continuous EEG recordings were sampled before (PRE) and immediately following (IP) the GXT. Regions of interest were primarily the dorsolateral prefrontal cortex (DLPFC), ventrolateral prefrontal cortex (VLPFC), and left and right motor cortex (MC). In the DLPFC, a frontal asymmetry index was also identified. There was a statistically significant increase in theta power in the DLPFC, VLPFC, and left and right MC from PRE to IP (all < 0.05). There was also a shift towards right hemisphere asymmetry at the IP time point in the DLPFC ( < 0.05). Finally, there was an increase in alpha power from PRE to IP in the right MC ( < 0.05). EEG could prove to be an important way to measure the effects of central fatigue on brain activity before and immediately following exercise.
脑电图（EEG）可用于评估运动期间大脑（皮层电活动）活动的实时变化。一些研究使用固定自行车运动来检查皮层电活动的变化，但结果不一。其中一些研究发现运动后大脑活动增加，而另一些研究则发现运动后大脑活动减少。因此，确定运动后大脑活动的变化非常重要。16名健康的未经训练的受试者（8名男性；8名女性）参与了该研究。所有16名参与者在直立式自行车测力计上进行了分级运动测试（GXT），直至自愿疲劳。在GXT之前（PRE）和之后立即（IP）进行连续脑电图记录。感兴趣的区域主要是背外侧前额叶皮层（DLPFC）、腹外侧前额叶皮层（VLPFC）以及左右运动皮层（MC）。在DLPFC中，还确定了一个额叶不对称指数。从PRE到IP，DLPFC、VLPFC以及左右MC中的θ波功率有统计学意义的增加（均P<0.05）。在IP时间点，DLPFC中也出现了向右半球不对称的转变（P<0.05）。最后，右侧MC中从PRE到IP的α波功率增加（P<0.05）。脑电图可能是测量运动前和运动后立即中枢疲劳对大脑活动影响的重要方法。
