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Conventional Ratio of Knee Flexors and Extensors Obtained Using an Isokinetic Dynamometer and Isoinertial Devices

2024; Universidad Santo Tomás; Volume: 14; Issue: 1 Linguagem: Inglês

10.15332/2422474x.9708

2422-474X

Igor Leandro Da Silva Carvalho, Danielli Braga de Mello, Rugero A. Bulzing, Giullio César Pereira Salustiano Mallen da Silva, Juliana Brandão Pinto de Castro, Jurandir Baptista da Silva, Vicente Pinheiro Lima, Guilherme J. M. Rosa, Rodolfo de Alkmim Moreira Nunes, Rodrigo Gomes de Souza Vale,

Advanced machining processes and optimization

This study aimed to analyze the conventional ratio values of knee flexors and extensors obtained using an isokinetic dynamometer (IsoRatio), an adjusted torque test of 5RM (Ratio5RM), and absolute values of 5RM (Ratio5RML). Fifteen male volunteers (28.47 ± 5.78 years; 78.30 ± 6.59kg; 1.79 ± 0.65m) performed a 5RM test on leg extension and leg curl machines. The volunteers executed knee flexion and extension movements at 60°/s angle speed without significant differences between protocols. Regression analysis showed that the Ratio5RML correlates with the isokinetic reference ratio (r=0.649; p=0.009). The result of the paired t-test showed no significant difference between the means of the isokinetic ratio and the ratio predicted by the equation. The results of the present study suggest that the 5RM test performed with isoinertial machines can be used to estimate conventional ratio and identify imbalance between the knee flexors and extensors muscles.