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Is dynamometry able to infer the risk of muscle mass loss in patients with COPD?

Authors Ramos D, Navarro Bertolini G, Rocha Leite M, Soares Carvalho Junior LC, da Silva Pestana PR, Ribeiro dos Santos V, de Souza Fortaleza AC, Machado Rodrigues FM, Cipulo Ramos EM

Received 23 June 2014

Accepted for publication 18 September 2014

Published 21 July 2015 Volume 2015:10(1) Pages 1403—1407


Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Dr Richard Russell

Dionei Ramos,1 Giovana Navarro Bertolini,1 Marceli Rocha Leite,1 Luiz Carlos Soares Carvalho Junior,1 Paula Roberta da Silva Pestana,1 Vanessa Ribeiro dos Santos,2 Ana Claudia de Souza Fortaleza,2 Fernanda Maria Machado Rodrigues,1 Ercy Mara Cipulo Ramos1

1Department of Physiotherapy, São Paulo State University, Presidente Prudente, Brazil; 2Department of Motricity Sciences, São Paulo State University, Rio Claro, Brazil

Introduction: Sarcopenia is characterized by a progressive and generalized decrease of strength and muscle mass. Muscle mass loss is prevalent in patients with chronic obstructive pulmonary disease (COPD) as a result of both the disease and aging. Some methods have been proposed to assess body composition (and therefore identify muscle mass loss) in this population. Despite the high accuracy of some methods, they require sophisticated and costly equipment.
Aim: The purpose of this study was to infer the occurrence of muscle mass loss measured by a sophisticated method (dual energy X-ray absorptiometry [DEXA]) using a more simple and affordable equipment (dynamometer).
Methods: Fifty-seven stable subjects with COPD were evaluated for anthropometric characteristics, lung function, functional exercise capacity, body composition, and peripheral muscle strength. A binary logistic regression model verified whether knee-extension strength (measured by dynamometry) could infer muscle mass loss (from DEXA).
Results: Patients with decreased knee-extension strength were 5.93 times more likely to have muscle mass loss, regardless of sex, disease stage, and functional exercise capacity (P=0.045).
Conclusion: Knee-extension dynamometry was able to infer muscle mass loss in patients with COPD.

Keywords: COPD, sarcopenia, peripheral muscle strength

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