A massa magra ou a massa de gordura são capazes de refletir o tempo sedentário em indivíduos com DPOC?
Is fat free mass or fat mass capable of reflecting sedentary time in individuals with COPD?
Franciele Del Nobile, Thais Moçatto Tofoli, Laís Santin, Letícia Medeiros, Heloisa Krokoch, Fabio Pitta
Resumo
Introdução: A maioria dos indivíduos com doença pulmonar obstrutiva crônica (DPOC) passa grande parte do dia em atividades sedentárias, e a composição corporal nessa população ainda é pouco estudada. Analisar a relação entre massa magra, massa de gordura e tempo sedentário (TS) pode ajudar a compreender melhor seus impactos e otimizar o manejo clínico. Objetivo: Determinar se há correlação do TS com o índice de massa livre de gordura (IMLG) ou com o índice de massa de gordura (IMG) em indivíduos com DPOC. Métodos: Trata-se de um estudo transversal que incluiu pacientes com DPOC submetidos à avaliação da atividade física na vida diária durante sete dias consecutivos por meio do uso de um acelerômetro para quantificar o TS (<1,5 METs) por dia. A composição corporal foi avaliada por meio da bioimpedância elétrica. Resultados: 32 indivíduos com DPOC foram analisados (56% homens, 70±7 anos, VEF1 47±20%pred, IMLG 25±5kg/m2). O TS foi de 519±136 minutos/dia (64±13% do dia). IMLG e IMG apresentaram correlação fraca com o TS, tanto expresso em minutos/dia (r=-0,30 e -0,31, respectivamente; p>0,05 para ambos) quanto em % do dia (r=-0,31 e -0,21, respectivamente, p>0,05 para ambos). Correlações estatisticamente significantes do TS com IMLG e IMG foram observadas apenas nos homens, embora moderadas (r=-0.40 e -0.54, respectivamente). Conclusão: O tempo sedentário apresentou correlação fraca com o IMLG e o IMG, sugerindo que a composição corporal não se relaciona de forma relevante com o comportamento sedentário em indivíduos com DPOC. Contudo, homens demonstraram correlação moderada, sugerindo possível associação do sexo nessa relação.
Palavras-chave
Abstract
Background: Most individuals with chronic obstructive pulmonary disease (COPD) spend much of their day in sedentary activities, and body composition in this population is still scarcely studied. Analyzing the relationship between fat-free mass, fat mass and sedentary time (ST) can help better understanding disease impacts and optimizing clinical management. Aim: To determine if there is correlation between ST and fat-free mass index (FFMI) or fat mass index (FMI) in individuals with COPD. Methods: This is a cross-sectional study that included individuals with COPD who underwent assessment of physical activity in daily life over seven consecutive days using an accelerometer to quantify ST (<1.5 METs) per day. Body composition was assessed using bioelectrical impedance analysis. Results: 32 individuals with COPD were analyzed (56% males, 70±7 years, FEV1/FVC 49±11%pred, FFMI 25±5 kg/m2). ST was 519±136 minutes per day (64±13% of the day). FFMI and FMI showed a weak and negative correlations with ST expressed both in minutes per day (r=-0.30 and -0.31, respectively; p>0.05 for both) as in % of the day (r=-0.31 and -0.21, respectively; p>0.05 for both). Statistically significant correlations of ST with FFMI and FMI were observed only in men, although moderate (r=-0.40 and -0.54, respectively). Conclusion: Sedentary time showed a weak correlation with FFMI and FMI, suggesting that body composition is not associated in a relevant way with sedentary behavior in individuals with COPD. However, men showed a moderate correlation, indicating a possible sex-related association in this relationship.
Keywords
Referências
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Submetido em:
29/04/2025
Aceito em:
07/01/2026
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