Lung function and physical performance in farmers with and without post-COVID-19: a comparative study

This study aimed to compare lung function between farmers with and without post-COVID-19 and to examine the correlations between lung function parameters and participant characteristics. Eighty-four farmers were recruited and divided into two groups: those without a history of COVID-19 and those with post-COVID-19. Lung function, upper limb muscle strength, and muscular endurance were assessed using spirometry, hand grip strength, and the 1-min sit to stand test (1STS), respectively. There were no significant differences in demographic data between groups (P > 0.05). Farmers without post-COVID-19 showed significantly higher handgrip strength, better 1STS performance, and higher FEV1% predicted compared to those with post-COVID-19 (P < 0.05). Exercise behavior was positively correlated with FVC% predicted and PEFR% predicted, while 1STS performance was also significantly associated with PEFR% predicted (P < 0.05). Farmers with post-COVID-19 showed reduced muscle strength, lower limb endurance, and decreased FEV1% predicted compared to those without post-COVID-19, indicating persistent impacts on lung function and physical performance. Exercise behavior and lower limb endurance were positively associated with lung function, highlighting the importance of regular physical activity in maintaining respiratory health, especially in individuals recovering from COVID-19.