A Cloth Facemask Causes No Major Respiratory or Cardiovascular Perturbations During Moderate to Heavy Exercise
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Citações na Scopus
2
Tipo de produção
article
Data de publicação
2023
Título da Revista
ISSN da Revista
Título do Volume
Editora
HUMAN KINETICS PUBL INC
Autores
GUARDIEIRO, Natalia Mendes
BARRETO, Gabriel
MARTICORENA, Felipe Miguel
OLIVEIRA, Tamires Nunes
OLIVEIRA, Luana Farias de
PINTO, Ana Lucia de Sa
PRADO, Danilo Marcelo Leite do
SAUNDERS, Bryan
GUALANO, Bruno
Citação
JOURNAL OF PHYSICAL ACTIVITY & HEALTH, v.20, n.1, p.35-44, 2023
Resumo
Purpose: Investigate whether a cloth facemask could affect physiological and perceptual responses to exercise at distinct exercise intensities in untrained individuals. Methods: Healthy participants (n = 35; 17 men, age 30 [4] y, and 18 women, age 28 [5] y) underwent a progressive square wave test at 4 intensities: (1) 80% of ventilatory anaerobic threshold; (2) ventilatory anaerobic threshold; (3) respiratory compensation point; and (4) exercise peak (Peak) to exhaustion, 5-minute stages, with or without a triple-layered cloth facemask (Mask or No-Mask). Several physiological and perceptual measures were analyzed. Results: Mask reduced inspiratory capacity at all exercise intensities (P < .0001). Mask reduced respiratory frequency (P = .001) at Peak (-8.3 breaths-min-1; 95% confidence interval [CI], -5.8 to -10.8), respiratory compensation point (-6.9 breaths-min-1; 95% CI, - 4.6 to -9.2), and ventilatory anaerobic threshold (-6.5 breaths-min-1; 95% CI, -4.1 to -8.8), but not at Baseline or 80% of ventilatory anaerobic threshold. Mask reduced tidal volume (P < .0001) only at respiratory compensation point (-0.5 L; 95% CI, - 0.3 to -0.6) and Peak (-0.8 L; 95% CI, -0.6 to -0.9). Shallow breathing index was increased with Mask only at Peak (11.3; 95% CI, 7.5 to 15.1). Mask did not change HR, lactate, ratings of perceived exertion, blood pressure, or oxygen saturation. Conclusions: A cloth facemask reduced time to exhaustion but had no major impact on cardiorespiratory parameters and had a slight but clinically meaningless impact on respiratory variables at higher intensities. Moderate to heavy activity is safe and tolerable for healthy individuals while wearing a cloth facemask. ClinicalTrials.gov: NCT04887714.
Palavras-chave
mask, COVID-19 pandemic, oxygen saturation, lactate
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