Division Health and Performance, Institute of Occupational, Social and Environmental Medicine, Goethe University Frankfurt, Theodor-Stern-Kai 7, Building 9B, 60590, Frankfurt am Main, Germany.
Department of Sports Medicine and Exercise Physiology, Institute of Sports Sciences, Goethe University Frankfurt, Frankfurt am Main, Germany.
Sci Rep. 2022 Jun 11;12(1):9708. doi: 10.1038/s41598-022-13711-2.
Mask induced airway resistance and carbon dioxide rebreathing is discussed to impact gas exchange and to induce discomfort and impairments in cognitive performance. N = 23 healthy humans (13 females, 10 males; 23.5 ± 2.1 years) participated in this randomized crossover trial (3 arms, 48-h washout periods). During interventions participants wore either a surgical face mask (SM), a filtering face piece (FFP2) or no mask (NM). Interventions included a 20-min siting period and 20 min steady state cycling on an ergometer at 77% of the maximal heart rate (HR). Hemodynamic data (HR, blood pressure), metabolic outcomes (pulse derived oxygen saturation, capillary carbon dioxide (pCO), and oxygen partial pressure (pO), lactate, pH, base excess), subjective response (ability to concentrate, arousal, perceived exertion) and cognitive performance (Stroop Test) were assessed. Compared to NM, both masks increased pCO (NM 31.9 ± 3.3 mmHg, SM = 35.2 ± 4.0 mmHg, FFP2 = 34.5 ± 3.8 mmHg, F = 12.670, p < 0.001) and decreased pH (NM = 7.42 ± 0.03, SM = 7.39 ± 0.03, FFP2 = 7.39 ± 0.04, F = 11.4, p < 0.001) during exercise. The FFP2 increased blood pressure during exercise (NM = 158 ± 15 mmHg, SM = 159 ± 16 mmHg, FFP2 = 162 ± 17 mmHg, F = 3.21, p = 0.050), the SM increased HR during sitting (NM = 70 ± 8 bpm, SM = 74 ± 8 bpm, FFP2 = 73 ± 8 bpm, F = 4.70, p = 0.014). No mask showed any comparative effect on other hemodynamic, metabolic, subjective, or cognitive outcomes. Mask wearing leads to slightly increased cardiovascular stress and elevated carbon dioxide levels during exercise but did not affect cognitive performance or wellbeing.
口罩引起的气道阻力和二氧化碳重吸入被认为会影响气体交换，并导致不适和认知表现受损。N=23 名健康成年人（13 名女性，10 名男性；23.5±2.1 岁）参加了这项随机交叉试验（3 组，48 小时洗脱期）。在干预期间，参与者分别佩戴手术口罩（SM）、过滤式面罩（FFP2）或不戴口罩（NM）。干预包括 20 分钟坐姿期和 20 分钟在测功计上以最大心率的 77%进行稳定状态循环。评估血流动力学数据（HR、血压）、代谢结果（脉搏衍生的氧饱和度、毛细血管二氧化碳（pCO）和氧分压（pO）、乳酸、pH 值、碱剩余）、主观反应（集中注意力的能力、觉醒度、感知用力）和认知表现（Stroop 测试）。与 NM 相比，两种口罩均增加了 pCO（NM 31.9±3.3mmHg，SM=35.2±4.0mmHg，FFP2=34.5±3.8mmHg，F=12.670，p<0.001）并降低了 pH 值（NM=7.42±0.03，SM=7.39±0.03，FFP2=7.39±0.04，F=11.4，p<0.001）在运动期间。FFP2 在运动期间增加了血压（NM=158±15mmHg，SM=159±16mmHg，FFP2=162±17mmHg，F=3.21，p=0.050），SM 在坐姿时增加了 HR（NM=70±8bpm，SM=74±8bpm，FFP2=73±8bpm，F=4.70，p=0.014）。NM 在其他血流动力学、代谢、主观或认知结果方面没有表现出任何比较效果。戴口罩会导致运动时心血管压力略有增加和二氧化碳水平升高，但不会影响认知表现或健康。
