Lower limb muscle strength is associated with functional performance and quality of life in patients with systemic sclerosis

Autor: Thaís L. M. Sousa, Mara Negreiros Carvalho, Agnaldo José Lopes, Fernando Silva Guimarães, Sara L. S. Menezes, Tatiana Rafaela Lemos Lima
Rok vydání: 2015
Předmět:
Zdroj: Brazilian Journal of Physical Therapy v.19 n.2 2015
Brazilian Journal of Physical Therapy
Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia (ABRAPG-FT)
instacron:ABRAPG-FT
Brazilian Journal of Physical Therapy, Vol 19, Iss 2, Pp 129-136 (2015)
Brazilian Journal of Physical Therapy, Volume: 19, Issue: 2, Pages: 129-136, Published: 13 MAR 2015
ISSN: 1413-3555
DOI: 10.1590/bjpt-rbf.2014.0084
Popis: Background: Complaints of peripheral muscle weakness are quite common in patients with systemic sclerosis (SSc). It is likely that the muscle impairments may reduce the patients' exercise performance, which in turn may decrease their functional capacity and exert a direct impact on their quality of life. Objectives: To assess the peripheral and respiratory muscle strength in individuals with SSc and to investigate their correlation with the 6-min walk distance (6MWD) and quality of life measurements. Moreover, we aimed to characterize their nutritional status, pulmonary function, functional capacity, and quality of life compared to the controls. Method: The present cross- sectional study included 20 patients with SSc and 20 control subjects. All of the participants were subjected to isometric dynamometry, surface electromyography, bioelectrical impedance analysis, pulmonary function testing, and the 6-min walk test. Patients with SSc also responded to the Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36) and the Health Assessment Questionnaire Disability Index (HAQ-DI). Results: The individuals with SSc exhibited a reduction in quadriceps strength (p=0.0001), increased quadriceps fatigability (p=0.034), impaired pulmonary function, and a reduced 6MWD (p=0.0001) compared to the controls. Quadriceps strength was significantly correlated with the 6MWD (Rho=0.719; p=0.0004) and the HAQ-DI (Rho=-0.622; p=0.003). We also found significant correlations between quadriceps fatigability and maximal inspiratory (Rho=0.684; p=0.0009) and maximal expiratory (Rho=0.472; p=0.035) pressure. Conclusions: Patients with SSc exhibited reduced respiratory muscle and quadriceps strength and an increase in its fatigability. In these individuals, there was a relationship between quadriceps strength, functional capacity, and quality of life.
Databáze: OpenAIRE