Our patients presented more severe obstruction (FEV1 34%) than those in literature. In Troosters et al. (2010), FEV1 values were on average 50% in the control group and 40% in the intervention group, similar to Ali et al. , whose FEV1 values were 44% in the control group and 46% in the intervention group. The mean 6MWD for our patients was lower than in literature; Troosters et al. (2010) and Borges and Carvalho (2014) showed that patients walked almost 100 metres more than our patients. Our patients presented more severity than those in literature hospitalized with exacerbated COPD.