Desempenho muscular, dor, rigidez e funcionalidade de idosas com osteoartrite de joelho Muscle performance, pain, stiffness, and functionality in elderly women with knee osteoarthritis

Abstract

OBJETIVO: Verificar a correlação do desempenho dos músculos do joelho e os domínios dor, rigidez e funcionalidade do Questionário Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) de idosas com osteoartrite de joelho (OA). MÉTODOS: Estudo transversal observacional com uma amostra de 80 idosas (71,2 ± 5,3 anos) com diagnóstico clínico de OA de joelho. Força, resistência e equilíbrio musculares foram avaliados por meio do dinamômetro isocinético Biodex System 3 Pro, nas velocidades angulares de 60º/s e 180º/s; a funcionalidade, presença de dor e rigidez foram avaliadas pelo questionário WOMAC. A correlação entre as variáveis foi analisada pelo teste de Spearman. RESULTADOS: Houve correlação inversa significativa da força e resistência musculares do quadríceps (QUA) e isquiossurais (IQS) nas velocidades de 60º/s e 180°/s, respectivamente, e da relação de equilíbrio muscular IQS/QUA a 180°/s com todos os domínios do WOMAC (pOBJECTIVE: To determinethe correlation between performance of the knee muscles and pain, stiffness, and functionality, through theWestern Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Questionnaire applied to an elderly population with osteoarthritis of the knee (OA). METHODS: This study uses an observational, cross-sectional approach applied to a convenience sample of 80 elderly individuals (71.2 ± 5.3 years of age) with a clinical diagnosis of OA of the knee. Muscle strength, resistance, and balance of the knee were evaluated using the Biodex System 3 Pro isokinetic dynamometer at angularspeedsof 60º/s and 180º/s. The self-reported functionality, presence of pain, and stiffness were evaluated by the WOMAC questionnaire. The correlation between the variables was analyzed bySpearman's coefficient of correlation (α = 0.05). RESULTS: A significant inverse correlation was observed between muscle strength and resistance of the quadriceps muscle (Q) and the hamstring muscle (H) at speeds of 60º/s and 180°/s, respectively, as well as in the relation between H/Q muscle balance at 180°/s and all domains of the WOMAC (p?0.05). CONCLUSIONS: The reduction in strength, resistance, and presence of imbalance in the knee muscles are inversely correlated with all the domains of the WOMAC in elderly individuals with OA. These results indicate a need for intervention that involves strengthening, resistance, and balance of the knee extensor and flexor muscles, aimed at reducing the impact of OA in relation to pain, stiffness, and functionality in elderly individuals. Level I, diagnostic studies - investigating a diagnostic test.

Keywords

• Osteoartrite
• Força muscular
• Idoso
• Osteoarthritis
• Muscle strength
• Aged