Effects of Face Masks on Respiratory Performance: A Within-Subject Design Study

Eng Keat Kwa, Poh Foong Lee
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Abstract

: There is an ongoing debate about whether wearing a facemask impacts respiratory performance, which is especially crucial in the prevention of COVID-19 transmission. This pre-and post-intervention within-subject design study aimed to quantify the impact of wearing a medical facemask during deep breathing on respiratory functions and compare it to deep breathing without a facemask. A total of 100 samples (n = 100) were obtained from a single healthy young male adult (age = 24 years) who underwent pulmonary function measurement before and after 5 min of deep breathing twice a day (morning and night) for 25 days without a facemask, followed by wearing a 4-ply medical face mask for the following 25 days. Significant improvements in all parameters (mean ± SD), including tidal volume (38.04 ± 46.97 mL, p < 0.005), vital capacity (34.08 ± 105.36 mL, p = 0.027), forced vital capacity (0.11 ± 0.11 L, p < 0.005), forced expiratory volume in 1 s (0.13 ± 0.13 L, p < 0.005), peak expiratory flow (0.36 ± 0.74 L/s, p < 0.005), and forced expiratory flow at 25–75% of forced vital capacity (0.04 ± 0.55 L/s, p < 0.005), were found without the facemask, whereas significant an improvement in forced expiratory volume in 1 s (0.05 ± 0.18 L, p = 0.049), a significant reduction in vital capacity ( − 29.98 ± 103.39 mL, p = 0.046), and no other significant changes were observed with the medical facemask. It was suggested that face masks exert breathing resistance but do not affect deep breathing performance. These results provide further knowledge of the effect of a facemask during deep breathing on respiratory performance.
面罩对呼吸功能的影响:主体内设计研究
:佩戴面罩是否会影响呼吸功能一直存在争议,而呼吸功能对预防 COVID-19 传播尤为重要。这项干预前和干预后的受试者内设计研究旨在量化深呼吸时佩戴医用面罩对呼吸功能的影响,并与不佩戴面罩的深呼吸进行比较。研究人员从一名健康男性青年(24 岁)身上共采集了 100 份样本(n = 100),对其进行了为期 25 天的肺功能测量,测量前和测量后分别进行了 5 分钟的深呼吸(每天早晚各两次),期间未佩戴面罩,随后 25 天佩戴了 4 层医用面罩。所有参数(平均值 ± SD)都有明显改善,包括潮气量(38.04 ± 46.97 mL,p < 0.005)、生命容量(34.08 ± 105.36 mL,p = 0.027)、强迫生命容量(0.11 ± 0.11 L,p < 0.005)、1 s 内强迫呼气量(0.13 ± 0.13 L,p < 0.005)、呼气流量峰值(0.36 ± 0.74 L/s,p < 0.005) 和 25-75% 强迫生命容量时的强迫呼气流量 (0.04 ± 0.55 L/s, p < 0.005)。05 ± 0.18 L,p = 0.049),生命容量显著减少(- 29.98 ± 103.39 mL,p = 0.046),而使用医用面罩后没有观察到其他显著变化。这表明面罩会产生呼吸阻力,但不会影响深呼吸效果。这些结果进一步说明了深呼吸时面罩对呼吸性能的影响。
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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