EVALUATION OF RESPIRATORY MUSCLE STRENGTH AND ENDURANCE, PERIPHERAL MUSCLE STRENGTH, AND FUNCTIONAL CAPACITY IN PATIENTS WITH COPD / AVALIAÇÃO DA FORÇA E RESISTÊNCIA MUSCULAR RESPIRATÓRIA, FORÇA MUSCULAR PERIFÉRICA E CAPACIDADE FUNCIONAL EM PACIENTES COM DPOC

This is an analytical, observational and cross-sectional study conducted from August 2017 to February 2020 in patients with Chronic Obstructive Pulmonary Disease (COPD) that aimed to assess respiratory muscle strength and endurance, peripheral muscle strength and functional capacity in patients with COPD. Respiratory muscle function was assessed using strength and endurance, peripheral muscle strength using the handgrip test, and functional capacity using the six-minute walk test (6MWT). The sensation of dyspnea was assessed by modified Medical Research Council and risk of exacerbation/hospitalization according to the classification of the Global Initiative for Chronic Obstructive Lung (GOLD). For statistical analysis, the Kolmogorov Smirnov, Chi-square, Pearson's correlation, Student t, ANOVA, and Bonferroni tests were performed with a significance level of 0.05. Forty patients were analyzed. There was a reduction in inspiratory and peripheral muscle strength in 97.5% (p <0.001) and 80% of patients (p = 0.001), respectively, in addition to a decrease in functional capacity in 97.4% (p <0.001) of individuals evaluated. There was a correlation between the GOLD classification with 6MWT (p=0.005) and inspiratory muscle strength (p=0.041), in addition to a relation between distance traveled and spirometric severity of obstruction (p=0.049). We conclude that there was a significant reduction in respiratory and peripheral muscle strength and functional capacity. The higher the degree of obstruction, the worse the performance on the 6MWT. In addition, patients who walked less have a higher risk of exacerbation and hospitalization, as well as those who have less respiratory muscle strength.