Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Rheumatology Division, Faculty of Medicine FMUSP, University of São Paulo, São Paulo, SP, Brazil.
Clinical Hospital, Faculty of Medicine FMUSP, University of São Paulo, São Paulo, Brazil.
PLoS One. 2023 Mar 6;18(3):e0282475. doi: 10.1371/journal.pone.0282475. eCollection 2023.
To investigate if a cloth facemask could affect physiological and perceptual responses to exercise at distinct exercise intensities in healthy young individuals.
Nine participants (sex, female/male: 6/3; age: 13±1 years; VO2peak: 44.5±5.5 mL/kg/min) underwent a progressive square-wave test at four intensities: (1) 80% of ventilatory anaerobic threshold (VAT), (2) VAT, and (3) 40% between VAT and [Formula: see text] wearing a triple-layered cloth facemask or not. Participants then completed a final stage to exhaustion at a running speed equivalent to the maximum achieved during the cardio-respiratory exercise test (Peak). Physiological, metabolic, and perceptual measures were measured.
Mask did not affect spirometry (forced vital capacity, peak expiratory flow, forced expiratory volume; all p≥0.27), respiratory (inspiratory capacity, end-expiratory volume [EELV] to functional vital capacity ratio, EELV, respiratory frequency [Rf], tidal volume [VT], Rf/VT, end-tidal carbo dioxide pressure, ventilatory equivalent to carbon dioxide ratio; all p≥0.196), hemodynamic (heart rate, systolic and diastolic blood pressure; all p>0.41), ratings of perceived exertion (p = 0.04) or metabolic measures (lactate; p = 0.78) at rest or at any exercise intensity.
This study shows that performing moderate to severe activity is safe and tolerable for healthy youth while wearing a cloth facemask.
ClinicalTrials.gov: NCT04887714.
研究在健康年轻个体中，不同运动强度下，布面口罩是否会影响运动时的生理和知觉反应。
9 名参与者（性别，女性/男性：6/3；年龄：13±1 岁；峰值摄氧量：44.5±5.5 mL/kg/min）在 4 个强度下进行了递增的方波测试：（1）80%的通气无氧阈（VAT），（2）VAT，和（3）VAT 和 [Formula: see text]之间的 40%，分别佩戴三层布面口罩或不佩戴。然后，参与者以与心肺运动测试中达到的最大速度相等的速度完成最后一个阶段至力竭（Peak）。测量生理、代谢和知觉指标。
口罩不影响肺活量计（用力肺活量、呼气峰流速、用力呼气量；所有 p≥0.27）、呼吸（吸气容量、呼气末肺容量 [EELV]与功能肺活量比、EELV、呼吸频率 [Rf]、潮气量 [VT]、Rf/VT、呼气末二氧化碳分压、二氧化碳通气当量比；所有 p≥0.196）、血流动力学（心率、收缩压和舒张压；所有 p>0.41）、感知用力程度（p = 0.04）或代谢指标（乳酸；p = 0.78）在休息或任何运动强度下。
本研究表明，对于健康的年轻人来说，在佩戴布面口罩的情况下，进行中度至剧烈运动是安全且可耐受的。
ClinicalTrials.gov：NCT04887714。
