Análise comparativa da atividade mioelétrica entre praticantes de skate, surfe e sedentários durante testes de equilibrio corporal

Abstract

Objective: To compare electromyographic activity of the lower limbs, among skaters, surfers and sedentary men during body balance tests. Methods: The sample consisted of 45 subjects, divided into 3 groups: 15 skaters (SKG: 21.9 ± 2.9 years, 65.1 ± 5.5 kg, 1.76 ± 0.07 m, 22.0 ± 1.3 kg/m2); 15 surfers (SFG: 24.1 ± 3.7 years, 69.9 ± 5.4 kg, 1.73 ± 0.05 m, 23.3 ± 1.7 kg/m2) and 15 sedentary (SDG: 22 , 5 ± 2.6 years, 68.2 ± 9.6 kg, 1.75 ± 0.06 m, 22.3 ± 2.2 kg/m2). The electrical signals of the muscles: medial gluteus (Gméd), vastus medialis (VM) and gastrocnemius medialis (GsMed) were analyzed bilaterally, concomitantly with the Biodex Balance System (BBS), in 5 stability levels (static, 12, 8, 4 and 1); 3 support conditions (BIP, DL and NDL) and two vision (WVF and NVF). The data were analyzed in the SPSS (20.0) by ANOVA (four-way) and Tukey's post-hoc test, to evaluate differences between groups, stability levels, support conditions and vision, considering a level of significance of 5% for all comparisons. Results: There were significant differences between SKG x SFG and SFG x SDG (P<0.001); (Static, 12, 8, 4 and 1: P<0.001), but there were no significant differences (P>0.05) for visual information conditions (WVF x NVF) and limbs (D and ND). Conclusion: The SFG presented greater electromyographic activation in all evaluated muscles, compared to the other groups, without being influenced by visual feedback and dominance of the lower limbs.