Brazilian jiu-jitsu simulated competition Part II: Physical performance, time-motion, technical-tactical analyses and perceptual responses
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 (four matches of 10 min). 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 with use of 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 non-dominant 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.
