在单次低强度与高强度启发性肌肉力量训练期间,上肢和下肢的急性血液动力反应
Audrey A Plouffe1, Kylah P Fischer1, Jennifer R Vranish1
1Department of Integrative Physiology and Health Science, Alma College, Alma, Michigan, United States.
Journal of applied physiology (Bethesda, Md. : 1985)
|September 21, 2023
概括
启发性肌肉力量训练 (IMST) 严重改变了上肢和下肢的血液流动和剪切率. 臂动脉流量减少,而逆向流量在两只四肢增加,为心血管益处提供了洞察力.
科学领域:
- 心血管生理学心血管生理学
- 呼吸道肌肉训练 呼吸道肌肉训练
背景情况:
- 鼓舞性肌肉力量训练 (IMST) 可以改善心肺功能.
- 对IMST的急性血液动力学反应尚不清楚.
- 了解这些反应可能会阐明IMST的慢性益处.
研究的目的:
- 为了评估一次IMST会话的急性血液动力学反应.
- 在不同的IMST强度下测量上肢和下肢血流 (BF) 和剪切率 (SR).
主要方法:
- 多普勒超声波评估了手臂和骨动脉BF和SR.
- 测量是在静止状态和低强度 (15%PImax) 和高强度 (75%PImax) IMST期间进行的.
- 分析了向和逆向的流动模式.
主要成果:
- 低强度和高强度的IMST减少了民间BF/SR (~10-20%) 和手臂BF/SR (~35-40%).
- 在手臂动脉中,前级BF/SR显著下降.
- 逆行性BF/SR在手动脉和骨动脉中显著增加.
- 对于大多数参数,没有观察到明显的强度依赖差异.
结论:
- 一次IMST发作急剧改变了四肢血管的血液动力学.
- 肢体动脉的前向流量减少和逆向流量增加是关键发现.
- 这些血管变化为IMST对心血管的益处提供了机械的见解.
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