Efeito do exercício de força com restrição de fluxo sanguíneo contínua e intermitente no desempenho neuromuscular, alterações bioquímicas e hemodinâmicas em homens

• Autor(a) principal: Rodrigues Neto, Gabriel
• Data de Publicação: 2017
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFPB
• Texto Completo: https://repositorio.ufpb.br/jspui/handle/123456789/13028
• topic: Kaatsu; Oclusão vascular; Exercício resistido; Treinamento de força; Vascular occlusion; Resistance exercise; Strength training; Kaatsu; Oclusión vascular; Ejercicios de resistencia; Entrenamiento de fuerza; CNPQ::CIENCIAS DA SAUDE::EDUCACAO FISICA

Strength exercise (SE) combined with blood flow restriction (BFR) has been gaining notoriety in the scientific community. Several researches have been developed to standardize the procedures inherent in this training method to minimize mistakes and increase safety. Mainly, intensity, cuff size and pressure (continuous or intermittent). The aim of the present study was to analyze the effect of ES with continuous and intermittent BFR on neuromuscular performance, biochemical, hemodynamic and perceptual changes in men. This research is characterized as experimental, composed of two phases: an acute (crossover) and a chronic approach with duration of six weeks, performed twice a week. In both phases, a population of men and two different samples were used. In the first (acute study), N=10 military recreationally trained in ES, with ages ranging from 18 to 21 years who were divided randomly between three protocols, and the biochemical, hemodynamic and perceptive measurements were collected. In the second (chronic study), N=25 apparently healthy with ages ranging from 18 to 36 years, and experience in SE (practice time = 2 months and = 12 months) whose measurements were neuromuscular, hemodynamic and perceptual performance. One-way, two-way or two-way of repeated measures were used followed by the Bonferroni post hoc test for the analysis of possible differences in the dependent variables. The significance level adopted was p<0.05 and the percent delta was used to verify changes between study evaluations. In the acute study, hypotensive effects were found in all three protocols (p=0.001) and there were no significant differences between the continuous and intermittent BFR protocols for hemodynamic, biochemical and perceptual measurements (p=0.112). In the chronic study, it was observed that there were no differences between the BFR protocols in the measures of neuromuscular, hemodynamic and perceptive performance (p=0.081); the percentage changes in hemodynamic and perceptual variables were lower in the intermittent BFR. It is concluded that continuous or intermittent BFR increase hemodynamic measurements immediately after exercise, but with greater magnitudes for continuous and both promote acute hypotensive effects, a fact not observed in the chronic study. The changes promoted by low load SE with BFR do not seem to promote muscle damage and indicate not to alter the markers of oxidative stress, generating similar changes in neuromuscular performance variables (activation, hypertrophy, dynamic strength, isometric strength and muscular endurance). The intermittent can promote a reduced effort perception and lower hemodynamic measures and may be used to increase neuromuscular performance, control, maintenance and/or safety of biochemical and hemodynamic measures as a non-drug intervention for normotensive and recreationally trained subjects. The intermittent and continuous BFR are similar in their applicability in neuromuscular, biochemical and hemodynamic performance variables; however, the intermittent seems to be a more indicated option when it comes to hemodynamic and perceptive measures, since it promoted a lower percentage variation.