Mild-to-moderate COVID-19 impact on the cardiorespiratory fitness in young and middle-aged populations

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Abstract

The goal of the present study was to compare pulmonary function test (PFT) and cardiopulmonary exercise test (CPET) performance in COVID-19 survivors with a control group (CG). This was a cross-sectional study. Patients diagnosed with COVID-19, without severe signs and symptoms, were evaluated one month after the infection. Healthy volunteers matched for sex and age constituted the control group. All volunteers underwent the following assessments: i) clinical evaluation, ii) PTF; and iii) CPET on a cycle ergometer. Metabolic variables were measured by the CareFusion Oxycon Mobile device. In addition, heart rate responses, peak systolic and diastolic blood pressure, and perceived exertion were recorded. Twenty-nine patients with COVID-19 and 18 healthy control subjects were evaluated. Surviving patients of COVID-19 had a mean age of 40 years and had higher body mass index and persistent symptoms compared to the CG (Po0.05), but patients with COVID-19 had more comorbidities, number of medications, and greater impairment of lung function (Po0.05). Regarding CPET, patients surviving COVID-19 had reduced peak workload, oxygen uptake (.VO2), carbon dioxide output (.VCO2), circulatory power (CP), and end-tidal pressure for carbon dioxide (PET CO2) (Po0.05). Additionally, survivors had depressed chronotropic and ventilatory responses, low peak oxygen saturation, and greater muscle fatigue (Po0.05) compared to CG. Despite not showing signs and symptoms of severe disease during infection, adult survivors had losses of lung function and cardiorespiratory capacity one month after recovery from COVID-19. In addition, cardiovascular, ventilatory, and lower limb fatigue responses were the main exercise limitations.

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Back, G. D., Oliveira, M. R., Camargo, P. F., Goulart, C. L., Oliveira, C. R., Wende, K. W., … Borghi-Silva, A. (2022). Mild-to-moderate COVID-19 impact on the cardiorespiratory fitness in young and middle-aged populations. Brazilian Journal of Medical and Biological Research, 55. https://doi.org/10.1590/1414-431X2022e12118

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