Association between functional balance and knee extensors strength in people with Parkinson’s disease

Sacha Clael, Filipe Dinato de Lima, Elaine Cristina da Silva Brandão, Jhonatan Conrado Rodrigues, Camila Wells Damato Marcelino, Rafaela do Vale Pinheiro, José Celi Neto, Lídia Mara Aguiar Bezerra


Aims: The aim of this study is to verify if there is a correlation between functional balance and muscular strength of knee extensors in individuals with Parkinson’s disease.

Methods: The sample consisted of 28 volunteers with Parkinson’s disease (age: 65.43±8.48 years, height: 1.68±0.10 cm, weight: 71.50±13.27 kg) classified on the modified Hoehn & Yahr scale. The Four Step Square Test and the isokinetic dynamometer were used to evaluate the dynamic balance and muscular strength of knee extensors, respectively.

Results: The peak torque shows a moderate, negative and significant correlation with the Four Step Square Test (right knee: r=-0.471 and p=0.012; left knee: r=-0.444 and p=0.018).

Conclusions: There is a negative, moderate and significant association between muscular strength of knee extensors and dynamic balance in Parkinson’s disease individuals.


Muscle Strength Dynamometer; Neurotransmitter Agents; Nerve Degeneration; Substantia Nigra; Activities of Daily Living.

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