Hypertension:研究称干重体力活伤心!

2019-11-08 朱朱 中国循环杂志

运动是心血管疾病最重要的预防措施之一,国内外很多指南都强调加强体力活动可以减少心血管死亡。但是,体力活动(physical activity)是一个广泛的概念,体育运动、工作以及休闲时的体力活动对心血管的保护作用可能存在差异。

运动是心血管疾病最重要的预防措施之一,国内外很多指南都强调加强体力活动可以减少心血管死亡。但是,体力活动(physical activity)是一个广泛的概念,体育运动、工作以及休闲时的体力活动对心血管的保护作用可能存在差异。

近日,Hypertension杂志公布的一项研究提示,高强度体育运动有益于身体健康,而工作时的重体力活动,例如工作时经常扛重物,可能会加重动脉硬化,因此可能不利于心血管健康,主要与心律失常有关。

研究者强调,该研究并不是说明工作时活动对身体有害,而是提示长期从事消耗很大体力的工作(例如举重物)可能会对心血管造成不良的影响。

“我们的研究结果为更好地理解体力活动与心血管疾病之间的关系展现了一条有价值的研究途径。”研究者指出,他们将在工作场所进一步开展研究,探索工作时的体力活动与健康状态之间的关系。

该研究显示,在工作的成年人中,工作时的体力活动可能导致神经压力反射敏感性(评估神经脉冲对血管扩张的反应,与衰老相关的心血管疾病有关)降低,而体育运动则可改善神经压力反射敏感性和机械压力反射敏感性(评估动脉硬化,与严重心律失常有关)。

休闲时的体力活动和总的体力活动与上述两种压力反射敏感性均无关。

另外,在不工作的成年人中,体育运动和总的体力活动均有助于改善机械压力反射敏感性,但对神经压力反射敏感性没有影响。

当动脉血压升高时,颈动脉窦和主动脉弓压力感觉反射,即引起压力感受性反射,其反射效应是使心率减慢,外周血管阻力降低,血压回降。这是一种机体的自我保护机制,压力反射敏感性变差时,心血管系统就会失去保护而受到影响。

该研究纳入8649人,这些人年龄处于50~75岁,其中5039人有工作,3610人不工作。研究者采用高精度颈动脉超声追踪技术来检测静息时神经压力反射敏感性和机械压力乏身敏感性。

原始出处:
Climie RE1,2,3, Boutouyrie P4, Perier MC1, et al.Association Between Occupational, Sport, and Leisure Related Physical Activity and Baroreflex Sensitivity: The Paris Prospective Study III.Hypertension. 2019 Nov 4:HYPERTENSIONAHA11913461. doi: 10.1161/HYPERTENSIONAHA.119.13461. [Epub ahead of print]

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    2020-05-19 feather89
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    2019-11-09 qingfengqishi5

    学习了,学习了

    0