Peroy Badal, RenataSevillano Castaño, Ana IsabelNúñez-Cortés, RodrigoGarcía Fernández, PabloTorres-Castro, RodrigoVilaró, JordiBlanco, IsabelGimeno-Santos, Elena2023-06-222023-06-222022-12-222227-903210.3390/healthcare11010051https://hdl.handle.net/20.500.14352/73371Many people recovering from an acute episode of coronavirus disease (COVID-19) experience prolonged symptoms. Exercise testing is a feasible and cost-effective option for assessing exercise tolerance, fatigue, and dyspnea related to effort. Being that the Chester step test (CST) is a progressive, submaximal test for predicting aerobic capacity, it could be a good option to explore. This study aimed to determine the reproducibility of CST for assessing exertional desaturation and exercise capacity in patients post-COVID-19 disease. A cross-sectional study was conducted on postCOVID-19 patients. Two attempts of the CST were performed. The intraclass correlation coefficient (ICC) was used to assess agreement between the two tests. Forty-two symptomatic post-COVID-19 patients were included, the mean age was 53.8 ± 10.3 years, and 52% were female. There was no significant difference between both tests (p = 0.896). Twenty-four percent of participants (10 cases) had a clinically significant decrease in SpO2 at the first assessment, compared to 30.1% (13 cases) at the second, with no significant difference. An ICC of 0.993 (95% CI: 0.987 to 0.996) was obtained for the total number of steps in the CSTengAtribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/journal articlehttps://doi.org/10.3390/healthcare11010051https://www.mdpi.com/2227-9032/11/1/51open access616.98:578.834796:612COVID-19Chester step testExercise capacityRehabilitationFisioterapia (Enfermería, Fisioterapia y Podología)3213.11 Fisioterapia