Brazilian Journal of Pulmonology

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

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Correlation of lung function and respiratory muscle strength with functional exercise capacity in obese individuals with obstructive sleep apnea syndrome

Associação entre função pulmonar, força muscular respiratória e capacidade funcional de exercício em indivíduos obesos com síndrome da apneia obstrutiva do sono

Thays Maria da Conceição Silva Carvalho1,a, Anísio Francisco Soares2,b, Danielle Cristina Silva Climaco3,c, Isaac Vieira Secundo3,d, Anna Myrna Jaguaribe de Lima2,e

J Bras Pneumol.2018;44(4):279-284

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Objective: To evaluate lung function and inspiratory muscle strength, correlating them with exercise tolerance, in obese individuals with obstructive sleep apnea syndrome (OSAS). Methods: The sample comprised 31 adult subjects with moderate-to-severe OSAS diagnosed by polysomnography. We used spirometry to measure FVC, FEV1, and FVC/FEV1 ratio, using pressure manometry to measure MIP and MEP. The incremental shuttle walk test (ISWT) and the six-minute walk test (6MWT) were used in order to determine functional exercise capacity. Results: In this sample, the mean values for FVC (% of predicted), FEV1 (% of predicted): MIP, and MEP were 76.4 ± 12.3%, 80.1 ± 6.3%, 60.0 ± 21.9 cmH2O, and 81.3 ± 22.2 cmH2O, respectively. The mean distances covered on the ISWT and 6MWT were 221 ± 97 m and 480.8 ± 67.3 m, respectively. The ISWT distance showed moderate positive correlations with FVC (r = 0.658; p = 0.001) and FEV1 (r = 0.522; p = 0.003). Conclusions: In this sample of obese subjects with untreated OSAS, lung function, inspiratory muscle strength, and exercise tolerance were all below normal. In addition, we found that a decline in lung function, but not in respiratory muscle strength, was associated with exercise tolerance in these patients.

 


Keywords: Sleep apnea syndromes; Exercise tolerance; Respiratory function tests; Respiratory muscles.

 


Authors' reply - Reflections on the article "Correlation of lung function and respiratory muscle strength with functional exercise capacity in obese individuals with obstructive sleep apnea syndrome"

Resposta dos autores sobre o artigo Reflexões sobre o artigo

Thays Maria da Conceição Silva Carvalho1,a, Anísio Francisco Soares2,b, Danielle Cristina Silva Climaco3,c, Isaac Vieira Secundo3,d, Anna Myrna Jaguaribe de Lima2,e

J Bras Pneumol.2019;45(2):e20180327-e20180327

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