The COVID-19 pandemic, a disease caused by the SARS-CoV-2 virus, has generated aninexplicable scenario for global health, causing different complications and degrees offunctional impairment in millions of people who manage to recover from the disease. Therespiratory system is the main system to be directly impacted during COVID-19 infection,and its treatment can generate changes in the respiratory function of individualssurviving the exacerbation of the disease, which may promote subjective and quantitativechanges in the respiratory pattern, requiring an evaluation with high-cost instruments,an evaluation necessary to outline a better planning therapeutic for this population. Thegoal of this study is evaluate the breathing pattern variables using a device calledRESPIRATORY DIAGNOSTIC ASSISTANT (RDA) and verify the relationship between the breathingpattern variables with the variables of pulmonary function, respiratory muscle strengthand respiration in patients after involvement by COVID-19. This is a observational andvalidation study, prospective with follow-up of respiratory function for 6 months, asubproject linked to the project already approved by the research ethics committee underopinion: 4.362.977/4.596.02. Data collection will be carried out in a single day anddivided into a few steps that will take place at the cardiopulmonary physiotherapylaboratory located at the physiotherapy department of the Federal University ofPernambuco. The first step is to conduct an interview with the participants to collectclinical data and perform a physical examination. Subsequently, a multidimensionalevaluation of respiratory function will be performed. Statistical analysis will beperformed using the Statistical Package For Social Science (SPSS) software version 20.0for Windows. The Kolmogorov-Smirnov test will be used to verify the type of distribution,regarding the normality of the variables, and the significance level adopted will be 95%(α