Brazilian Journal of Pulmonology

ISSN (on-line): 1806-3756 | ISSN (printed): 1806-3713

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Association between physical activity in daily life and pulmonary function in adult smokers

Associação entre o nível de atividade física na vida diária e a função pulmonar em tabagistas adultos

Miriane Lilian Barboza1, Alan Carlos Brisola Barbosa1, Giovanna Domingues Spina1, Evandro Fornias Sperandio1, Rodolfo Leite Arantes2, Antonio Ricardo de Toledo Gagliardi2, Marcello Romiti2, Victor Zuniga Dourado1

J Bras Pneumol.2016;42(2):130-135

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Objective: To determine whether the level of physical activity in daily life (PADL) is associated with pulmonary function in adult smokers. Methods: We selected 62 adult smokers from among the participants of an epidemiological study conducted in the city of Santos, Brazil. The subjects underwent forced spirometry for pulmonary function assessment. The level of PADL was assessed by the International Physical Activity Questionnaire and triaxial accelerometry, the device being used for seven days. The minimum level of PADL, in terms of quantity and intensity, was defined as 150 min/week of moderate to vigorous physical activity. Correlations between the studied variables were tested with Pearson's or Spearman's correlation coefficient, depending on the distribution of the variables. We used linear multiple regression in order to analyze the influence of PADL on the spirometric variables. The level of significance was set at 5%. Results: Evaluating all predictors, corrected for confounding factors, and using pulmonary function data as outcome variables, we found no significant associations between physical inactivity, as determined by accelerometry, and spirometric indices. The values for FVC were lower among the participants with arterial hypertension, and FEV1/FVC ratios were lower among those with diabetes mellitus. Obese participants and those with dyslipidemia presented with lower values for FVC and FEV1. Conclusions: Our results suggest that there is no consistent association between physical inactivity and pulmonary function in adult smokers. Smoking history should be given special attention in COPD prevention strategies, as should cardiovascular and metabolic comorbidities.

 


Keywords: Smoking; Respiratory function tests; Motor activity; Accelerometry.

 


Restrictive pattern on spirometry: association with cardiovascular risk and level of physical activity in asymptomatic adults

Distúrbio ventilatório restritivo sugerido por espirometria: associação com risco cardiovascular e nível de atividade física em adultos assintomáticos

Evandro Fornias Sperandio1, Rodolfo Leite Arantes2, Agatha Caveda Matheus1, Rodrigo Pereira da Silva1, Vinícius Tonon Lauria1, Marcello Romiti2, Antônio Ricardo de Toledo Gagliardi2, Victor Zuniga Dourado2

J Bras Pneumol.2016;42(1):22-28

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Objective: To determine whether a restrictive pattern on spirometry is associated with the level of physical activity in daily life (PADL), as well as with cardiovascular disease (CVD) risk factors, in asymptomatic adults. Methods: A total of 374 participants (mean age, 41 ± 14 years) underwent spirometry, which included the determination of FVC and FEV1. A restrictive pattern on spirometry was defined as an FEV1/FVC ratio > 0.7 and an FVC < 80% of the predicted value. After conducting demographic, anthropometric, and CVD risk assessments, we evaluated body composition, muscle function, and postural balance, as well as performing cardiopulmonary exercise testing and administering the six-minute walk test. The PADL was quantified with a triaxial accelerometer. Results: A restrictive pattern on spirometry was found in 10% of the subjects. After multivariate logistic regression, adjusted for confounders (PADL and cardiorespiratory fitness), the following variables retained significance (OR; 95% CI) as predictors of a restrictive pattern: systemic arterial hypertension (17.5; 1.65-184.8), smoking (11.6; 1.56-87.5), physical inactivity (8.1; 1.43-46.4), larger center-of-pressure area while standing on a force platform (1.34; 1.05-1.71); and dyslipidemia (1.89; 1.12-1.98). Conclusions: A restrictive pattern on spirometry appears to be common in asymptomatic adults. We found that CVD risk factors, especially systemic arterial hypertension, smoking, and physical inactivity, were directly associated with a restrictive pattern, even when the analysis was adjusted for PADL and cardiorespiratory fitness. Longitudinal studies are needed in order to improve understanding of the etiology of a restrictive pattern as well as to aid in the design of preventive strategies.

 


Keywords: Spirometry; Hypertension; Motor activity; Sedentary lifestyle; Smoking.

 


Influence of age and gender on the profile of exhaled volatile organic compounds analyzed by an electronic nose

Influência da idade e do gênero no perfil de compostos orgânicos voláteis exalados analisados por nariz eletrônico

Miriane Lilian Barboza1, Alan Carlos Brisola Barbosa1, Giovanna Domingues Spina1, Evandro Fornias Sperandio1, Rodolfo Leite Arantes2, Antonio Ricardo de Toledo Gagliardi2, Marcello Romiti2, Victor Zuniga Dourado1

J Bras Pneumol.2016;42(2):143-145

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We aimed to investigate the effects of age and gender on the profile of exhaled volatile organic compounds. We evaluated 68 healthy adult never-smokers, comparing them by age and by gender. Exhaled breath samples were analyzed by an electronic nose (e-nose), resulting in "breathprints". Principal component analysis and canonical discriminant analysis showed that older subjects (≥ 50 years of age) could not be distinguished from younger subjects on the basis of their breathprints, as well as that the breathprints of males could not distinguished from those of females (cross-validated accuracy, 60.3% and 57.4%, respectively).Therefore, age and gender do not seem to affect the overall profile of exhaled volatile organic compounds measured by an e-nose.

 


Keywords: Breath tests; Volatile organic compounds; Electronic nose.

 


 

 


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