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Does wearing a facemask decrease arterial blood oxygenation and impair exercise tolerance?
Respiratory Physiology & Neurobiology ( IF 2.3 ) Pub Date : 2021-08-03 , DOI: 10.1016/j.resp.2021.103765
Carl J Ade 1 , Vanessa-Rose G Turpin 1 , Shannon K Parr 1 , Stephen T Hammond 1 , Zachary White 1 , Ramona E Weber 2 , Kiana M Schulze 2 , Trenton D Colburn 2 , David C Poole 2
Affiliation  

Introduction

Concerns have been raised that COVID-19 face coverings compromise lung function and pulmonary gas exchange to the extent that they produce arterial hypoxemia and hypercapnia during high intensity exercise resulting in exercise intolerance in recreational exercisers. This study therefore aimed to investigate the effects of a surgical, flannel or vertical-fold N95 masks on cardiorespiratory responses to incremental exercise.

Methods

This investigation studied 11 adult males and females at rest and while performing progressive cycle exercise to exhaustion. We tested the hypotheses that wearing a surgical (S), flannel (F) or horizontal-fold N95 mask compared to no mask (control) would not promote arterial deoxygenation or exercise intolerance nor alter primary cardiovascular variables during submaximal or maximal exercise.

Results

Despite the masks significantly increasing end-expired peri-oral %CO2 and reducing %O2, each ∼0.8−2% during exercise (P < 0.05), our results supported the hypotheses. Specifically, none of these masks reduced sub-maximal or maximal exercise arterial O2 saturation (P = 0.744), but ratings of dyspnea were significantly increased (P = 0.007). Moreover, maximal exercise capacity was not compromised nor were there any significant alterations of primary cardiovascular responses (mean arterial pressure, stroke volume, cardiac output) found during sub-maximal exercise.

Conclusion

Whereas these results are for young healthy recreational male and female exercisers and cannot be applied directly to elite athletes, older or patient populations, they do support that arterial hypoxemia and exercise intolerance are not the obligatory consequences of COVID-19-indicated mask-wearing at least for cycling exercise.



中文翻译:

戴口罩会降低动脉血氧并削弱运动耐力吗?

介绍

人们担心,COVID-19 面罩会损害肺功能和肺部气体交换,以至于它们在高强度运动期间会产生动脉低氧血症和高碳酸血症,从而导致休闲锻炼者出现运动不耐受。因此,本研究旨在调查外科手术、法兰绒或垂直折叠 N95 口罩对增量运动的心肺反应的影响。

方法

这项调查研究了 11 名成年男性和女性,他们在休息时进行渐进循环运动直至筋疲力尽。我们测试了以下假设:与不戴口罩(对照)相比,佩戴外科 (S)、法兰绒 (F) 或水平折叠 N95 口罩不会促进动脉脱氧或运动不耐受,也不会改变次最大或最大运动期间的主要心血管变量。

结果

尽管面罩显着增加了呼气末口周 %CO 2并减少了 %O 2,但运动期间各增加了 ∼0.8-2% (P < 0.05),我们的结果支持了假设。具体而言,这些面罩均未降低次最大或最大运动动脉 O 2饱和度 (P = 0.744),但呼吸困难等级显着增加 (P = 0.007)。此外,最大运动能力没有受到影响,在次最大运动期间也没有发现主要心血管反应(平均动脉压、每搏输出量、心输出量)的任何显着变化。

结论

尽管这些结果适用于年轻健康的休闲男性和女性锻炼者,不能直接应用于精英运动员、老年人或患者群体,但它们确实支持动脉低氧血症和运动不耐受不是 COVID-19 指示的戴口罩的必然后果至少用于骑自行车运动。

更新日期:2021-08-12
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