Análise do controle postural em apoio unipodal e do desempenho isocinético de flexores e extensores do joelho em atletas de futsal e possíveis associações entre essas variáveis

Abstract

Objective: To analyze postural control in unipodal support and the isokinetic performance of knee flexors and extensors in futsal athletes, and to identify an association between risk of muscle fatigue and unipodal balance in the evaluated athletes. Method: A descriptive cross-sectional study, including a sample of 25 adult male futsal athletes (23.8 ± 4.42 years). In order to assess postural control, dynamic computerized posturography (EquiTest® System - NeuroComInternational, Inc) was used, and the unilateral test was selected, in unipodal support (eyes open and closed), dominant (D) and non-dominant lower limb (ND). To assess the muscle function of knee flexors and extensors, the Biodex System Pro 4 TM isokinetic dynamometer (Biodex Medical Systems, Inc., New York, USA) was used, at a speed of 300 ° / s, in the concentric mode, in which unilateral (antagonist agonist relationship) and bilateral (between members) asymmetries were evaluated, in addition to the fatigue index (IF). Results: The athletes presented greater postural oscillations with their eyes closed, in D lower limb. A high percentage of unilateral asymmetry was evidenced, especially in the D lower limb, and 80% presented risk of fatigue in the flexor muscles of the D lower limb. We found that 60% of athletes with high values of postural oscillation had a significant association with the risk of developing fatigue in the knee flexor muscles of the D lower limb. Conclusion: We found a high percentage of athletes with muscle asymmetries, as well as associations between a worse postural balance and high risk of muscle fatigue, and such findings may increase the risk of sport injuries.