运动皮层刺激和抑制因有氧运动强度而有差异
Nesrine Harroum1,2,3, Amanda O'Farrell1,2, Layale Youssef1,2,3
1École de kinésiologie et des sciences de l'activité physique (EKSAP), Faculté de médecine, Université de Montréal, 2100, boul Édouard-Montpetit, Montréal, QC H3T 1J4, Canada.
Cerebral cortex (New York, N.Y. : 1991)
|August 20, 2025
概括
高强度间歇训练 (HIIT) 和中等强度间歇训练 (MIIT) 提高了大脑的刺激能力. 所有运动强度都减少了神经抑制,中等强度运动对运动皮层电路产生了最持久的影响.
科学领域:
- 神经科学
- 运动生理学
- 发动机控制
背景情况:
- 已知急性有氧运动可以增强运动学习和神经可塑性.
- 之前的研究已经探讨了AEX对初级运动皮层 (M1) 兴奋性的影响,但各种强度的综合剂量反应关系尚未完全理解.
研究的目的:
- 研究不同强度的急性有氧运动 (AEX) 如何调节不同的主要运动皮质 (M1) 电路.
- 检查AEX强度与皮质脊髓刺激性和短间隔内皮抑制 (SICI) 的变化之间的剂量反应关系.
主要方法:
- 三十名健康的成年人参加了四个条件:休息,轻强度间歇训练 (LIIT),中等强度间歇训练 (MIIT) 和高强度间歇训练 (HIIT).
- 在每次干预前,干预后及20分钟后,使用过体磁刺激 (TMS) 来测量皮质脊髓刺激性和SICI.
- 运动方案包括20分钟的骑自行车, 交替工作和恢复间隔.
主要成果:
- 高强度间歇训练 (HIIT) 和MIIT显著增加皮质脊髓刺激能力,HIIT显示出更持久的效果.
- 所有AEX强度,包括LIIT,MIIT和HIIT,导致SICI的降低.
- 在SICI中,MIIT表现出最实质性和持续的下降.
结论:
- MIIT和HIIT都有效地提高了原发动性皮层中的皮质脊髓刺激能力.
- AEX强度会影响M1电路的调节,对刺激性和抑制性有不同的影响.
- 这项研究证实了有氧运动强度对运动皮层神经可塑性的剂量依赖作用.
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