在年轻人和老年人中,类似的内皮依赖血管对间歇性缺氧的反应
Sten Stray-Gundersen1, Frank Wojan1, Hirofumi Tanaka1
1Department of Kinesiology and Health Education, The University of Texas at Austin, Austin, Texas, United States.
Journal of applied physiology (Bethesda, Md. : 1985)
|June 27, 2024
概括
间歇性缺氧是一种呼吸技术,通过增加关动脉直径来改善血管功能,无论是年轻人还是老年人. 年龄不会影响这种血管扩张反应,这表明跨年龄组对心血管健康的潜在益处.
科学领域:
- 心血管生理学心血管生理学
- 衰老研究研究 衰老研究
- 呼吸系统生理学 呼吸系统生理学
背景情况:
- 衰老会损害血管内皮功能,其特点是氧化生物可用性降低和流量介导扩张.
- 间歇性缺氧 (IH) 在年轻人中显示有潜力维持或改善血管功能.
研究的目的:
- 研究年龄对血管对间歇性缺氧反应的影响.
- 为了比较IH对年轻人与老年人的血管功能的影响.
主要方法:
- 12名年轻人和11名老年人接受了两次实验室会议,其中包括IH或假协议.
- 测量包括血中酸盐度和手臂动脉流介导扩张在干预前后.
- IH协议:八个4分钟的80%氧和周期,间隔室内空气.
主要成果:
- 间歇性缺氧诱导臂动脉血管扩张在年轻人和老年人.
- 没有观察到手臂动脉剪切率或酸盐度的显著变化.
- 在任何年龄组中,手臂动脉流介导扩张都没有受到IH或假协议的急性影响.
结论:
- 对间歇性缺氧的血管扩张反应不受年龄的影响.
- 间歇性缺氧会增加手臂动脉直径,但不会急性影响年轻或老年人的内皮依赖血管扩张.
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