在年轻成年人中,自愿运动和电动肌肉刺激之间,活跃肌肉的血流和氧气利用的差异变化
Makoto Katagiri1, Mikie Nakabayashi1, Yasuhiro Matsuda2
1Electrical Engineering Program, Graduate School of Science and Technology, Meiji University, Kanagawa, Japan.
Journal of applied physiology (Bethesda, Md. : 1985)
|March 14, 2024
概括
电动肌肉刺激 (EMS) 通过增强氧气提取来增加肌肉的氧气消耗,类似于自愿 (VOL) 运动. 与VOL收缩相比,EMS还会导致运动后肌肉血流和氧气使用的持续时间更长.
科学领域:
- 运动生理学 运动生理学
- 肌肉生理学 肌肉生理学
- 生物医学光学 生物医学光学
背景情况:
- 电动肌肉刺激 (EMS) 对肌肉血液流动和收缩期间/之后的氧气利用的生理影响尚未完全理解.
- 需要对EMS和自愿 (VOL) 收缩进行比较,以澄清这些生理反应.
- 扩散相关性和近红外光谱学 (DCS-NIRS) 提供非侵入性方法来评估肌肉血液动力学和新陈代谢.
研究的目的:
- 为了比较EMS期间和之后的局部肌肉血流和氧气消耗,与人类的VOL收缩相比.
- 研究氧气提取和输送在不同收缩类型的反应中的作用.
主要方法:
- 24名健康的成年人接受了间歇性等比脚背部屈曲 (2秒收缩,2秒放松) 在20%的最大VOL张力下2分钟.
- 收缩是由EMS或VOL引起的,然后是6分钟的恢复期.
- DCS-NIRS测量了前肌的局部组织血液流量指数 (rBFI),氧气提取分数 (rOEF) 和氧气代谢率 (rMRO2) 的相对变化.
主要成果:
- 与VOL运动相比,EMS诱导的ROEF和rMRO2的增加更大,与可比的rBFI.相比.
- 运动后,rBFI和rMRO2在EMS后下降的速度比VOL慢,但仍然显著升高.
- EMS 显示肌肉 perfusion 和有氧新陈代谢的增强更明显,更长时间.
结论:
- 通过增强氧气提取,EMS增加了肌肉的氧气消耗,氧气输送速度与VOL运动相似.
- 与VOL运动相比,EMS提供了更明显和持续的肌肉 perfusion 和有氧新陈代谢的增加.
- 这项研究是首次使用DCS-NIRS可视化持续肌肉血流和EMS期间和之后的氧气利用变化.
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