与男性相比,女性在次最大炼期间表现出更大的心脏体积减少,与呼吸肌肉负荷相比,男性在次最大炼期间表现出更大的心脏体积减少
Sarah A Angus1, Michelle Ottlik2, Connor J Doherty1
1Department of Kinesiology and Health Sciences, University of Waterloo, Waterloo, ON, Canada.
The Journal of physiology
|February 24, 2026
概括
运动期间的胸内压力操纵对男性和女性的心脏体积的影响不同. 呼吸负荷减少了两性中风体积,女性显示左心室末缩体积的独特下降.
科学领域:
- 心血管生理学心血管生理学
- 运动生理学 运动生理学
- 呼吸系统生理学 呼吸系统生理学
背景情况:
- 胸内压力 (ITP) 通过调节静脉回流和心室填充,影响心脏功能.
- 呼吸机动,特别是在运动期间,可以加剧ITP波动.
- 以前的研究表明,在最大运动时的ITP变化不会改变心脏体积,但机制和性别差异仍然不清楚.
研究的目的:
- 调查在亚最大运动期间操纵胸内压力是否会对男性和女性的心脏体积产生不同的影响.
- 探索吸气和呼气负载呼吸对运动期间左心室体积和中风体积的影响.
主要方法:
- 年轻,健康的男性和女性 (n=30,15个) 接受了两个最大限度以下的运动方案:吸入式负载呼吸和呼出式负载呼吸.
- 胸内压力是使用食道测量仪测量的.
- 使用心声学对左心室体积和心脏输出进行了评估.
主要成果:
- 在两性中,激发性负荷并没有改变中风体积,这表明运动反应掩盖了潜在的心脏体积变化.
- 呼吸负荷减少了男性和女性的中风体积.
- 在呼吸负荷期间,女性的左心室末缩体积显著下降,这种反应在男性中没有观察到.
结论:
- 亚最大运动似乎与鼓动负荷相关的心脏体积变化.
- 呼吸负荷在运动期间会造成预负荷的限制,男性的心脏会补偿,但女性的心脏不会,导致左心室末缩体积减少.
- 这些发现突出了性别特异性心血管适应在运动期间改变的胸内压力.
关键词:
超声心电图 (Echocardiography) 是一种心声回声仪.运动就是炼身体.过期负荷的使用量.心肺相互作用的心肺相互作用启发性的负载胸内压力 胸内压力性别差异的性别差异.冲击的体积 冲击的体积 冲击的体积更多相关视频
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