Differences between cardiorespiratory fitness in adult men with asymptomatic or mild SARS-COV-2 infections

Introduction This study aimed to measure and compare CRF levels between COVID-19-infected adults with asymptomatic and mild symptoms. Methods The participants in this study included 50 adult men, who were further divided into 2 equal categories: mild symptomatic (MS) and asymptomatic (AS) groups. These participants received a series of anthropometry and Rockport 1.5-mile run tests. During the Rockport 1.5-mile run test, their heart rate (HR) was continuously monitored using a Polar V800 GPS. Following this test, Borg’s CR10-scale rating of perceived exertion (RPE) was employed. Results One-way ANOVA statistical test results showed a significant difference (<i>p</i> = 0.007, ES = 0.140) between the MS and AS groups, where the VO<sub>2</sub>max in the AS group, was greater than the MS group (35.7 ± 7.1 vs 29.6 ± 8.4 ml/kg/min). Conclusions Asymptomatic patients had a higher VO<sub>2</sub>max level than mildly symptomatic patients. Therefore, moderate-intensity exercise was recommended to increase CRF, thereby enhancing immunity and reducing the risk of contracting COVID-19.