title: Brazilian Jiu-Jitsu Simulated Competition Part II: Physical Performance, Time-Motion, Technical-Tactical Analyses, and Perceptual Responses.
abstract: 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 (F(2.5,17.6) = 2.7; p = 0.087; η² = 0.28) and flexibility (F(7,63) = 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 (F(2.0,15.9) = 8.1; p = 0.004; η² = 0.50), which was not confirmed by the Bonferroni test. Jump height indicated postactivation potentiation after match 2 (F(7,63) = 3.5; p = 0.003; η² = 0.28). The maximal isometric handgrip strength in the dominant hand (F(3.2,28.6) = 2.9; p = 0.049; η² = 0.24) and in the nondominant hand (F(7,63) = 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 (F(3,12) = 0.6; p = 0.624; η² = 0.13). The perceptions of effort (F(3,27) = 0.9; p = 0.469; η² = 0.09) and recovery (F(1.9,17.0) = 2.4; p = 0.125; η² = 0.21) and the degree of fatigue reported (F(1.5,13.8) = 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.
authors.affiliation: 1School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil; 2State University of Santa Catarina, Center of Physical Education, Physiotherapy, and Sports, Florianópolis, Brazil; 3Department of Physiology and Biophisics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil; and 4Human Physiology Department, State University of Maringá, Maringá, Brazil.
authors.forename: Leonardo V
authors.initials: LV
authors.lastname: Andreato
authors.forename: Ursula F
authors.initials: UF
authors.lastname: Julio
authors.forename: Valeria L
authors.initials: VL
authors.lastname: Gonçalves Panissa
authors.forename: João V
authors.initials: JV
authors.lastname: Del Conti Esteves
authors.forename: Felipe
authors.initials: F
authors.lastname: Hardt
authors.forename: Solange M
authors.initials: SM
authors.lastname: Franzói de Moraes
authors.forename: Camila
authors.initials: C
authors.lastname: Oliveira de Souza
authors.forename: Emerson
authors.initials: E
authors.lastname: Franchini
mesh_terms: D000328:Adult; D054874:Athletic Performance / Q000502:physiology*; D001938:Brazil; D003163:Competitive Behavior; D018737:Hand Strength / Q000502:physiology; D006801:Humans; D008297:Male; D016139:Martial Arts / Q000502:physiology*; D018763:Muscle Fatigue / Q000502:physiology; D053580:Muscle Strength / Q000502:physiology*; D010465:Perception; D010807:Physical Endurance / Q000502:physiology; D011930:Reaction Time; D013997:Time Factors