下肢高温症在训练过的老年人和年轻人中类似地增加了小肌肉量运动期间的功能性高血症
Nuno Koch Esteves1, Ashraf W Khir2, José González-Alonso1
1Division of Sport, Health, and Exercise Sciences, Department of Life Sciences, Brunel University London, Uxbridge, UK.
Experimental physiology
|July 6, 2023
概括
年龄不会影响下肢在热和运动期间的血液流动. 健康的老年人保持腿部高血压,表现出与年轻人相比可以保持血管功能.
科学领域:
- 身体生理学 身体生理学
- 血管生物学 血管生物学
- 老年学是指老年学的学科.
背景情况:
- 热和运动疗法被推用于所有年龄段的血管健康.
- 以前对高温和运动对老年人的血液动力学影响的研究已经产生了不一致的结果.
- 衰老通常与组织 perfusion 减少有关,特别是在热应激和体力活动期间.
研究的目的:
- 调查局部四肢高温和运动对老年人和年轻人的下肢血液动力学的独立影响.
- 为了确定年龄是否会在被动高温期间对局部血液动力学产生不利影响,运动,以及它们的组合.
- 为了比较训练有素的老人和年轻人之间的血液动力学反应.
主要方法:
- 9名健康,训练有素的老年人和10名年轻人参与了这项研究.
- 参与者进行了90分钟的单一全腿加热,随后进行了10分钟的低强度增量单脚膝盖伸展运动.
- 腿部血液动力学和温度概况在股骨动脉和骨动脉上进行测量.
主要成果:
- 在两组中,局部高温症显著增加了全腿皮肤温度和血液流量 (超过三倍).
- 运动,加上高温症,进一步增加了腿部的血液流动,老年人和年轻人之间没有显著差异.
- 虽然老年参与者在加热后表现出更大的动脉直径和更低的血液速度,但整体四肢溢血和运动过度血症得到保留.
结论:
- 年龄不会影响下肢高血压在局部高温和/或小肌肉量运动期间.
- 经过训练的老年人保持了肢体的高 perfusion 和运动高血压,尽管与年龄相关的动脉变化.
- 研究结果表明,定期炼可以减轻与年龄相关的血管对热量和运动反应的潜在下降.
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