PMID: 29484246Feb 28, 2018Paper

ISOKINETIC ASSESSMENT OF MUSCULAR STRENGTH AND BALANCE IN BRAZILIAN ELITE FUTSAL PLAYERS

International Journal of Sports Physical Therapy
Renan F H NunesSérgio G da Silva

Abstract

Strength asymmetries are related to knee injuries in intermittent sports players. The purpose of this study was to examine whether elite futsal players demonstrate strength asymmetries during knee isokinetic testing applying the Croisier et al.21 criteria. Forty male elite (27.9 ± 6.5 years) Brazilian futsal players participated in the study. The testing protocol required players to perform concentric contractions of both quadriceps and hamstring muscles at angular velocities of 60 °·s-1and 240 °·s-1and eccentric contractions of hamstring at 30 °·s-1and 120 °·s-1. Conventional (concentric:concentric) and mixed (eccentric:concentric) hamstrings/quadriceps (H/Q) ratios were calculated. Subjects were determined to have an imbalanced strength profile if an athlete had at least two parameters that were asymmetrical across speeds and conditions. Asymmetry was operationally defined as peak torque asymmetry greater than 15% in bilateral comparison, and H/Q ratio less than 0.47 for conventional and 0.80 for mixed conditions. Significant differences were observed between preferred and nonpreferred limbs in the concentric contractions of flexors at 240 °·s-1and eccentric contractions of extensors and flexors at 30 °·s-1and 120 °·s-1. Howe...Continue Reading

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