患有慢性阻塞性肺病的低地人的运动表现急性暴露于2048米:一个随机交叉试验
Konstantinos Bitos1, Tobias Kuehne1, Tsogyal D Latshang1
1University Hospital Zurich, Department of Respiratory Medicine, Zurich, Switzerland.
International journal of chronic obstructive pulmonary disease
|August 23, 2023
概括
高空暴露显著降低了COPD患者的运动表现,较低的氧和和增加的通风是关键因素. 呼吸障碍和最大心率保持不变,表明对高度的特定生理反应.
科学领域:
- 肺部医学 肺部医学
- 高度生理学 高度生理学
- 运动科学 运动科学
背景情况:
- 数以百万计的人前往高海拔地区,包括患有慢性阻塞性肺病 (COPD) 的人.
- 关于急性高空暴露对COPD患者运动表现的影响的数据有限.
- 本研究研究了中等高度对COPD运动能力的生理影响.
研究的目的:
- 为了确定急性中等高度暴露对COPD患者运动表现的影响.
- 为了确定在海拔高度运动能力的变化背后的生理机制.
- 为计划前往高海拔地区的COPD患者提供见解.
主要方法:
- 在29名COPD患者 (GOLD等级2-3) 中采用了随机交叉设计.
- 参与者在低海拔 (490米) 和中等海拔 (2048米) 进行了增量坡道运动测试 (IET).
- 在两个高度分析了运动表现和呼吸对呼吸气体交换.
主要成果:
- 与490米相比,最大输出功率 (Wmax) 在2048米下降了6% (p<0.05).
- 峰值氧气吸收量 (V'O2峰值) 在2048m降低了6% (p<0.05).
- 氧和度 (SpO2) 降低了8% (p<0.05),而分钟通风率 (V'E) 在更高的海拔上增加了.
结论:
- 对2048m的急性暴露会导致COPD患者的运动表现显著下降.
- 减少血液氧化和增加通风,没有感知到呼吸困难或最大心率,解释了性能下降.
- 研究结果强调了COPD患者在中等海拔地区所面临的生理挑战.
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