This study investigates the effects of home-based Kakao Healthcare breathing exercises and stretching on respiratory function and fatigue in COVID-19-cured patients. A total of 35 participants performed four movements of home-based breathing exercises and five respiratory muscle stretching exercises four times a week for four weeks. Respiratory function was measured using forced vital capacity (FVC), forced expiratory volume in one second (FEV1), FEV1/FVC ratio, and peak expiratory flow (PEF). Fatigue was assessed using the Fatigue Severity Scale (FSS). Data analysis was performed using independent-sample and paired-sample t-tests in SPSS 24, with the significance level set at p < 0.05. After four weeks of home-based Kakao Healthcare breathing exercises, there were significant increases in respiratory FVC, FEV1, FEV1/FVC, and PEF function values observed in the training group (T.G.) after the exercise intervention (p < 0.05). Such an increase was observed when comparing these values with their corresponding pre-exercise measurements. In contrast, there were no statistically significant differences in respiratory function outcomes before and after exercise in the control group (C.G.) (p > 0.05). The FSS scores were statistically significant within the training group (T.G.) (p > 0.05). The 4-week Kakao Healthcare breathing exercise scheme was found to be capable of improving some respiratory functions in COVID-19-recovered patients, but it showed no significant improvement in fatigue levels.

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