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在Normobaric低氧耐受性测试后肌肉氧化的分析

Inés Albertus-Cámara¹, María-José Paredes-Ruiz¹, Ignacio Martínez-González-Moro¹

¹Physical Exercise and Human Performance Research Group, Mare Nostrum Campus, University of Murcia, 30001 Murcia, Spain.

Journal of functional morphology and kinesiology

|May 28, 2024

概括

在健康个体中,急性normobaric缺氧会降低四肢肌肉氧化 (SmO2). 这种减少发生不论测试完成或性别,观察到两个不同的生理反应模式.

科学领域:

运动生理学运动生理学
运动科学运动科学运动科学
高度生理学高度生理学

背景情况:

了解缺氧期间的肌肉氧化对于运动员和军人来说至关重要.
常态性缺氧模拟高海拔条件,影响生理反应.
近红外光谱法 (NIRS) 是一种用于评估肌肉氧和 (SmO2) 的非侵入性工具.

研究的目的:

为了研究急性常态性缺氧对四肢肌肉氧化的影响.
为了比较完成低氧耐受性测试的个体与没有完成的个体之间的SmO2变化.
确定对低氧的生理反应的潜在模式.

主要方法:

54名健康参与者接受了使用11%FiO2 (模拟5050m) 的正常低氧耐受性测试 (NHTT).
用Humon Hex®装置测量肌肉氧和 (SmO2) 使用近红外光谱法 (NIRS).
在测试前 (PRE),测试后 (POST) 和10分钟恢复期间记录了SmO2,分组按测试完成分为 (10分钟 vs. <10分钟).

主要成果:

在normobaric缺氧期间,在所有参与者 (p < 0.0001) 中观察到四旋翼SmO2的显著下降.
在性别之间或在完成或不完成NHTT的组之间,没有发现SmO2减少的显著差异.
两种反应模式出现了:一种是持续时间较短且缺氧较高的,另一种是持续时间较长且缺氧较低的.

结论:

急性normobaric缺氧持续减少四头肌肌肉氧化在健康个体.
减少SmO2的程度是独立于性别和完成10分钟低氧耐受性测试的能力.
对缺氧的个体反应可能呈现出与持续时间和强度相关的不同的模式.

关键词:

肌肉氧气和度肌肉氧气和度接近红外光谱法近红外光谱法诺莫巴里克缺氧是一种正常的缺氧.

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