Efeito agudo do precondicionamento isquêmico em diferentes compressões de restrição de fluxo sanguíneo no desempenho anaeróbio de indivíduos treinados

Abstract

Introduction: high performance sport is an area of study that increasingly raises interventions with the aim of improving performance. For every modality there is an energetic, physical, technical, tactical requirement, among others, that are typical of its demand, whether individual or collective sports. The present study presents the following problem question: does ischemic preconditioning (IPC) in different blood flow restriction compressions improve anaerobic performance? Objective: to analyze the acute effect of ischemic preconditioning in different compressions of blood flow restriction on the anaerobic performance of trained individuals. Materials and Methods: the research has a quasi-experimental characteristic, crossed and randomized design, in which the subjects were their own controls and submitted to four experimental conditions before the RAST anaerobic power test: C1 = without PCI; C2 = IPC at 20 mmHg (SHAM); C3 = IPC at 220 mmHg and C4 = IPC at 100% of the auscultatory pulse. The study included 21 trained individuals (21.0 ± 2.3 years), male, who performed the power test after 4 experimental conditions in a randomized manner. For statistical analysis, the Shapiro-Wilk and Levene normality tests were performed and, as the data had a normal distribution, the means were compared using the Analysis of Variance (ANOVA) test, followed by the Bonferroni post hoc test, with a significance level of p ≤ 0.05. Results: Despite the IPC with 100% of the PA demonstrating a positive trend towards the improvement in the averages of Pmáx (Δ = 2.6%), Pméd (Δ = 0.7%), Pmín (Δ = 1.8%) and running time in 35 m (Δ = 0.8%), none of the variables showed a significant effect between the experimental conditions. It is concluded that, even presenting a subtle improvement in the maximum, average and minimum powers in a 35-meter running test, when using the 100% compression of the AP, the PCI did not demonstrate a significant increase in the performance of trained individuals.