[Relationship between exhaustion time and blood oxygen saturation of brain and muscle tissues at the moment of exhaustion under high temperature environment].

Q4 Medicine Zhongguo ying yong sheng li xue za zhi = Zhongguo yingyong shenglixue zazhi = Chinese journal of applied physiology Pub Date : 2022-11-01 DOI:10.12047/j.cjap.6365.2022.128

Da-Lei Wang, Jian Lang

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引用次数: 0

Abstract

目的: 探讨高温环境运动中脑和肌肉组织血氧饱和度的动态变化,以及力竭时间与其力竭即刻时血氧饱和度的关系。方法: 24名男性大学生,在常温、高温环境条件下各进行一次力竭运动,采用近红外光谱技术,对运动及恢复阶段脑组织、肌肉组织血氧饱和度变化情况进行同步观察。监测运动前、后血乳酸水平。计算不同环境条件下力竭时间与力竭即刻脑组织、肌肉组织血氧饱和度的相关性。结果: 高温环境力竭时间极显著低于常温环境(P＜0.01),而力竭即刻血乳酸水平显著高于常温环境(P＜0.05);常温、高温环境条件下,脑组织血氧饱和度随运动持续下降,肌肉组织血氧饱和度呈先上升后下降趋势。力竭即刻,脑组织、肌肉组织血氧饱和度均达最低水平,且高温环境脑组织、肌肉组织血氧饱和度均显著低于常温环境(P＜0.05);常温环境条件下,力竭时间与力竭即刻脑组织、肌肉组织血氧饱和度水平相关系数分别为r= 0.575(P＜0.05)和r= 0.825(P＜0.01)。高温环境条件下,力竭时间与力竭即刻脑组织、肌肉组织血氧饱和度水平相关系数分别为r= 0.632(P＜0.01)和r= 0.539(P＜0.05)。结论: 在高温环境运动中,力竭时间与力竭即刻脑及肌肉组织血氧饱和度呈正相关。.

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