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Effects of Wearing Face Masks on Exercise Capacity and Ventilatory Anaerobic Threshold in Healthy Subjects During the COVID-19 Epidemic.
Lin, Qiang; Cai, Yuxing; Yu, Changjun; Gu, Wei; Tan, Yan; Wang, Li; Chen, Anliang; Cheng, Kai; Meng, Ting; Li, Xueping.
  • Lin Q; Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China (mainland).
  • Cai Y; Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China (mainland).
  • Yu C; Department of Rehabilitation Medicine, First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China (mainland).
  • Gu W; Department of Respiratory and Critical Care Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China (mainland).
  • Tan Y; Department of Respiratory and Critical Care Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China (mainland).
  • Wang L; Department of Respiratory and Critical Care Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China (mainland).
  • Chen A; Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China (mainland).
  • Cheng K; Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China (mainland).
  • Meng T; The First Clinical Medical College of Nanjing University of Traditional Chinese Medicine, Nanjing, Jiangsu, China (mainland).
  • Li X; Department of Rehabilitation Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China (mainland).
Med Sci Monit ; 28: e936069, 2022 May 30.
Article in English | MEDLINE | ID: covidwho-1876158
ABSTRACT
BACKGROUND Face masks have become an important part of the COVID-19 prevention approach. This study aimed to explore the effect of wearing masks on exercise ability and ventilatory anaerobic threshold (VAT). MATERIAL AND METHODS Thirty-four young, healthy volunteers were included in this study, consisting of 18 men and 16 women. The subjects were randomized to perform 2 cardiopulmonary exercise tests (CPET) on a cycle ergometer with gas exchange analysis, one with and another without wearing a face mask (cross-over design). The general data for all subjects and indicators from the 2 exercise tests performed with and without wearing a face mask were collected. RESULTS In cardiopulmonary exercise tests, wearing a mask significantly (P<0.05) decreased peak indexes (eg, work rate (WR), oxygen consumption per kg body weight (VO2/kg), heart rate (HR), ventilation per minute (VE) and carbon dioxide ventilation equivalent (VE/VCO2)) and anaerobic threshold indexes (eg, WR, HR, VE, breath frequency (BF), dead space ratio (VD/VT), and VE/VCO2). However, the PETCO2 at peak was significantly higher. There was a positive linear correlation between WR difference and VO2 difference at VAT (abbreviated as deltaWR@VAT and deltaVO2@VAT, respectively) (r=0.495, P=0.003). Subgroup analysis of the VAT indexes showed that WR, VO2/kg, and VE were significantly decreased in the advanced VAT group with mask compared with the stable VAT group with mask (P<0.05). Logistic regression showed that deltaVE, deltaBF, and deltaVE/VCO2 had independent influences on VAT. CONCLUSIONS Wearing masks advances VAT in healthy young subjects during CPET. The advanced VAT was associated with changes in VE, BF, and VE/VCO2 while wearing masks.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Anaerobic Threshold / COVID-19 Type of study: Experimental Studies / Randomized controlled trials Limits: Female / Humans / Male Language: English Journal: Med Sci Monit Journal subject: Medicine Year: 2022 Document Type: Article

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Anaerobic Threshold / COVID-19 Type of study: Experimental Studies / Randomized controlled trials Limits: Female / Humans / Male Language: English Journal: Med Sci Monit Journal subject: Medicine Year: 2022 Document Type: Article