Introduction: The 1-minute sit-to-stand test (1min-STST) is a quick, easy-to-use field test for measuring functional capacity. During the pandemic, this test has been recommended in remote situations; however, its reliability in this scenario hasn't been measured in chronic respiratory diseases (CRDs). Therefore, our objective was to assess the reliability of 1min-STST in remote settings in CRDs.

Methods: A cross-sectional study was conducted on patients with CRDs (> 18 years). In random order, the 1min-STST was performed physically in the hospital (G1) and via web-based platform (G2). We compared the repetitions, biological signals (oxygen saturation (SpO2) and heart rate (HR)), and perceived dyspnoea and lower limb fatigue, pre and post-tests, and HR recovery the minute after the test. We used Mann-Whitney or t-test based on the data distribution. The intraclass correlation coefficient (ICC) was used to assess the reliability between the two tests.

Results: Data from 32 patients were analysed with a median age of 63 (P25-P75 44-71) years. The most commons diagnosis were COPD (n=16), asthma (n=6), and pulmonary fibrosis (n=4). More details in Table 1. Reliability testing showed no statistically significant differences in the repetitions (G1: 25.1 ± 7.8 and G2: 25.0 ± 8.0, p=0.844). SpO2, HR, dyspnoea, and fatigue did not differ between the two tests. Strong reliability for both tests (ICC = 0.974) was found.

Conclusion: The 1-minSTST performed remotely is a reliable tool to assess functional capacity in patients with CRDs Hence, this test could be a good strategy if there is no chance to evaluate the functional capacity in person.