The effects of exertional heat stress on some complex cognitive functions

Praxis Medica Pub Date : 2021-01-01 DOI:10.5937/pramed2104013s

J. Stojićević, Vanja Jovanovic

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Abstract

Introduction/Aim: Heat stress represents the important problem in military services. This study investigates the effects of exertional heat stress on complex cognitive functions. Methods: 40 male soldiers performed exertional heat stress test, of which 10 performed the test of the same intensity in cool environment. Cognitive functions were mesured by computerized battery CANTAB, before and immediately after exertional heat stress test. Results: Exertional heat stress led to impairment of some cognitive functions in unacclimatized group: decrease of accuracy in MTS test (from 92,6±4,2% towards 84,5±6,9%, p<0,05) and PSRs (from 85,0±8,0% towards 77,0±9,6%, p<0,05), while similar decreases were recorded in MTS test in passively acclimatized group (from 92,2±5,5% towards 87,7±5,6%, p<0,05) i.e. in PSRs test in actively acclimatized group (from 83,3±6,3% towards 69,4±5,1%, p<0,05). The reaction time was not affected in any group whatsoever. Discussion and conclusion: Exertional heat stress leads to mild impairment of complex cognitive functions, particularly in domain of accuracy. Physical strain itself, however, does not affect cognitive functions. Relatively resistance to heat stress in zoung soldiers may be contributed to their high aerobic level.

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运动性热应激对某些复杂认知功能的影响

前言/目的:热应激是军事服务中的重要问题。本研究探讨了运动性热应激对复杂认知功能的影响。方法:40名男性士兵进行运动性热应激试验，其中10名在凉爽环境下进行相同强度的试验。在运动热应激测试之前和之后，通过计算机化电池CANTAB测量认知功能。结果:运动热应激导致未适应组部分认知功能受损:MTS测试准确性从92,6±4,2%下降到84,5±6,9%，p< 0.05)和PSRs测试准确性从85,0±8,0%下降到77,0±9,6%，p< 0.05)，被动适应组MTS测试准确性从92,2±5,5%下降到87,7±5,6%，p< 0.05)，主动适应组PSRs测试准确性从83,3±6,3%下降到69,4±5,1%，p< 0.05)。任何一组的反应时间都不受影响。讨论和结论:运动性热应激导致复杂认知功能的轻度损伤，特别是在准确性方面。然而，身体紧张本身并不影响认知功能。老年士兵对热应激的相对抵抗力可能与他们的高有氧水平有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Praxis Medica

自引率

0.00%

发文量

审稿时长

4 weeks