Brazilian jiu-jitsu simulated competition Part II: Physical performance, time-motion, technical-tactical analyses and perceptual responses
Leonardo Vidal Andreato, Ursula Julio, Valeria Leme Gonçalves Panissa, João Victor Del Conti Esteves, Felipe Hardt, Solange Marta Franzói de Moraes, Camila Oliveira de Souza, Emerson Franchini
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.