Blood lactate and rate of perceived exertion in Brazilian jiu-jitsu and Submission combats

Nowadays, the combat sports have gained great popularity in society. Among the modalities that have been highlighted given the Brazilian jiu-jitsu, modality which aims to dominate the opponent and takes him to withdraw from the joint use of chokes and joint keys. When not occur submission the combat is decided by points coming from specific techniques (take down, sweep, passing the guard, knee on the belly, mount and back control) [1]. Brazilian jiu-jitsu is originally practiced with the use of gi. However, there are many competitions that are played without the use of gi. Recently the International Federation of Brazilian jiu-jitsu implemented Brazilian jiu-jitsu no-gi competitions [1]. In addition, prior to World Brazilian jiu-jitsu no-gi be created existed competitions of no-gi (known as submission) who kept the rules of Brazilian jiu-jitsu or adopted some changes, like the case of the biggest event of clawed fights of the world, the Abu Dahbi Combat Club, event founded by Arab sheiks. Thus, it is common for athletes Brazilian jiu-jitsu compete and be successful in both competitions, with and without the use of gi. However, it is unclear whether there are physiological differences between the two styles. In the Brazilian jiu-jitsu can be stated that the combats promote moderate activation of the glycolytic pathway, given the concentrations of blood lactate [Lac] observed in simulated combat and [2-4] and in real competitions [5,6]. Furthermore, Brazilian jiu-jitsu athletes rated the fights as „somewhat hard” on simulations of 10 minutes [3] and as ”light or somewhat hard” on real competition [5]. However, as yet there are no informations about the physiological and perceptual responses in Submission combats. The lack of knowledge results in an empirical character of the specific training prescription and planning. Thereby, it is common that data obtained in similar modalities (judo and Olym pic wresting) are used by coaches [7]. However, it is necessary that studies be conducted directly with the Brazilian jiu-jitsu and Submission, because there are differences in the dynamics of the fights which can generate peculiarities, as time structure of a Brazilian jiu-jitsu fight (117 s of fighting for 33 s recovery) [5] that is different from Judo and Wrestling, considering that in Judo, the time structure of fights is 30 ± 33 s of fighting for a 12 ± 4 s pause [8] while in Wrestling it is 37 ± 10 s of fighting for a 14 ± 6 s pause [9]. Considering the previous information, this study aimed to determine whether there differences in [Lac] and rate of per-