• Cristiano Mostarda, Catarina de Andrade Barboza, Ana Lídia Cutrim, Antonio Carlos Silva-Filho, Carlos José Dias, Janaina De Oliveira Brito-Monzani, and Bruno Rodrigues.
• Laboratorio de Adaptacoes Cardiovasculares ao Exercicio (LACORE), Universidade Federal do Maranhao, Sao Luis, MA, BR.
• Clinics (Sao Paulo). 2021 Jan 1; 76: e1826.

ObjectivesWe compared the autonomic modulation and sleep behavior of eutrophic and overweight patients with chronic obstructive pulmonary disease (COPD).MethodsCOPD participants were divided into the overweight and eutrophic groups. Pulmonary function, blood pressure, body composition, autonomic modulation, and the Pittsburgh Sleep Quality Index score were assessed. Participants performed the six-minute walk test for functional assessment.ResultsSpirometric variables obtained in eutrophic and overweight individuals with COPD showed no statistically different results. We observed that the SDNN index indicated lower overall variability (p=0.003), and root mean square of successive differences between normal heart beats (RMSSD) (p=0.04) indicated lower parasympathetic modulation in the overweight group than observed in the eutrophic group. The indexes of the frequency domain presented lower values of total variability (p<0.01), low frequency bands (p<0.01), and high frequency (p=0.02), suggesting a higher sympathetic modulation and reduced parasympathetic modulation of the overweight group compared to eutrophic group. The overweight group also showed reduced sleep quality than the eutrophic group.ConclusionOverweight COPD patients showed lower autonomic modulation and impaired sleep quality, latency, and efficiency as compared eutrophic subjects. These results reinforce the importance of weight control and the acquisition of healthy habits in this population.

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