Validity of different prediction equations of the maximum load in mixed martial arts athletes

<p class="ResumoAbstract"><span lang="EN-US">The purpose of this study was to investigate the validity of different prediction equations to the one maximum repetition (1-RM) test at the bench press exercise (BP) with bar in mixed martial arts (MMA) athletes. The sample was composed by 19 male MMA athletes (27.68 ± 6.19 years). The data collection was performed in two different moments: 1) in 1-RM test; 2) in submaximal test and their respective numbers of repetitions. The paired-sample t test was performed and was noted that, among the six equations compared with the 1-RM test, only the Adams (<em>p</em>= 0.337) and O’Conner’s (<em>p</em>= 0.250) equations showed no significant differences. However, there were high Pearson correlation and intraclass correlation coefficients (<em>r</em>= 0.924, ICC= 0.924; <em>r</em>= 0.944, ICC= 0.944), respectively. Nevertheless, all equations showed high correlations that ranged between 0.854 and 0.944. In conclusion, for estimation of 1-RM, the predictive equations based on Adams and O'Conner’s are valid in MMA athletes.</span></p

Acute effect of aerobic exercise with blood flow restriction on blood pressure and heart rate in healthy young subjects

The aim of the present study was to verify the acute effect of the aerobic exercise (AE) with blood flow restriction (BFR) upon systolic (SBP), diastolic blood pressure (DBP) and heart rate (HR) in health youngsters. Participated in the present study 13 young normotensive students (19.5 ± 1.7 years old). The sample was randomly divided into two experimental protocols: stationary race with BFR and stationary race without BFR. Subjects performed 5 sets of 2 minutes with 1 minute of rest interval for both protocols. SBP, DBP and HR were measured at rest, in the end of the exercises and during 60 minutes after conditions. The AE without BFR presented hypotensive effect 60 minutes post exercise (p= 0.029); the AE with and without BFR elevated significantly the SBP and HR immediately post exercise (p< 0.05) and the AE with BFR presented higher DBP and HR values immediately post-exercise when compared to AE without BFR (p= 0.001; p< 0.001, respectively). It is concluded that the AE without BFR does not seem to maximize the hypotensive effect, both sessions can increase SBP and HR immediately post-exercise with significant higher values in DBP and HR for AE with BFR

Technical and tactical performance indicators based on the outcome of the set in the school volleyball

The aim of the study was to identify and compare the technical and tactical performance indicators based on the outcome of the set in the school female volleyball. The study included 110 athletes, aged between 12 and 14 years, belonging to 11 teams. Fifty-eight sets of 28 games were filmed and 7194 actions, 2830 serves, 2157 serve reception, 1358 passes and 1299 attacks were analyzed. Afterwards, the game sets were divided into winners and losers sets. Teams that won the sets had advantage at the serve reception, set and attack on error and excellence/point criteria (p< 0.05) and of serve, set and attack (p< 0.001). In conclusion, the winner’s sets were those with a better technical-tactical performance quantitatively and qualitatively