terça-feira, 30 de junho de 2015

Artigo sobre BJJ na edição de julho do JSCR

Competição simulada de BJJ: desempenho físico, estrutura temporal, análises técnicas e táticas e respostas perceptivas
Journal of Strength & Conditioning Research:
July 2015 - Volume 29 - Issue 7 - p 2015–2025
doi: 10.1519/JSC.0000000000000819
Brazilian Jiu-Jitsu Simulated Competition Part II: Physical Performance, Time-Motion, Technical-Tactical Analyses, and Perceptual Responses
Andreato, Leonardo V.1,2; Julio, Ursula F.1; Gonçalves Panissa, Valeria L.1; Del Conti Esteves, João V.3; Hardt, Felipe1; Franzói de Moraes, Solange M.4; Oliveira de Souza, Camila3; Franchini, Emerson1
The aim of this study was to analyze performance, time structure, technical actions, and perceptual responses in Brazilian jiu-jitsu athletes during a simulated competition. For this purpose, 10 athletes were analyzed in a simulated competition (4 matches of 10 minutes). Physical tests and scales of the perception of effort and recovery were applied. The matches were recorded for the purpose of technical-tactical analysis and to determine the time structure. The main results show that in the simulated competition, reaction time (F2.5,17.6 = 2.7; p = 0.087; η2 = 0.28) and flexibility (F7,63 = 1.5; p = 0.172; η2 = 0.15) were unchanged across the matches. An analysis of variance showed a significant difference for grip endurance using the kimono (F2.0,15.9 = 8.1; p = 0.004; η2 = 0.50), which was not confirmed by the Bonferroni test. Jump height indicated postactivation potentiation after match 2 (F7,63 = 3.5; p = 0.003; η2 = 0.28). The maximal isometric handgrip strength in the dominant hand (F3.2,28.6 = 2.9; p = 0.049; η2 = 0.24) and in the nondominant hand (F7,63 = 3.8; p = 0.002; η2 = 0.30) showed a decline after matches 3 and 4. Although these data indicate the onset of fatigue, the effort/pause ratio of the matches was not altered (F3,12 = 0.6; p = 0.624; η2 = 0.13). The perceptions of effort (F3,27 = 0.9; p = 0.469; η2 = 0.09) and recovery (F1.9,17.0 = 2.4; p = 0.125; η2 = 0.21) and the degree of fatigue reported (F1.5,13.8 = 0.5; p = 0.588; η2 = 0.05) did not change during the simulated competition. Thus, it may be concluded that the execution of successive matches causes a decline in maximal isometric handgrip strength. No changes in the time structure of the matches or in the perceptual responses were observed.

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