Correlation between the biomechanical analysis of functional knee tests with the performance in the isokinetic dynamometer in futsal athletes

Abstract

Futsal is a sport with extensive reports of lower limb injuries, with the knee joint being one of the most affected. Drop Vertical Jump (DVJ) and Single Hop Test (SHT) are tests that analyze knee changes to prevent injuries in professional futsal athletes. However, in the literature, the number of studies correlating knee tests with the Isokinetic Dynamometer (ISO) is scarce. Thus, the objective of the study is to compare the biomechanical variables of lower limbs (MI) in DJV and SHT and to correlate with ISO in futsal athletes. Participants will be 15 male athletes, aged from 18 to 35 years old, who will perform the DVJ (with the help of a 40 cm high crate) the SHT (unipodal jump) and the ISO muscle test. Two Bertec power platforms will be located at the time of DVJ landing and the SHT jump. ISO will follow a three-series protocol of 5, 10 and 20 repetitions at speeds of 60 °. S-1, 180 °. S -1 and 300 °. S-¹. Twenty-one retroreflective markers will be placed in the MI, besides 4 electromyography (EMG) sensors. The analyzes will be processed in the MatLab software to obtain angular velocities of the knee, angles of rotation, peak ground reaction force across the platforms and the signs of muscular activation captured by the EMG. Through the Biodex software, the torque peak and index of symmetry of the extensor and flexor muscles of the MI (I / Q ratio) will be obtained. In case of acceptance of the FAPESP scholarship, there is interest of the BEPE scholarship. Statistical analysis will be through Pearson's correlation and paired t-test. The level of significance will be p <0.05. (AU)