STRENGTH BEHAVIOR AND MUSCLE HYPERTROPHY AFTER TRAINING WITH PRACTICAL BLOOD FLOW RESTRICTION AND ITS RELATIONSHIP WITH MUSCLE VISCOELASTIC PROPERTIES: RANDOMIZED CONTROLLED CLINICAL TRIAL

• Grant number: 24/15952-1
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: February 01, 2025
• End date: December 31, 2025
• Field of knowledge: Health Sciences - Physiotherapy and Occupational Therapy
• Principal Investigator: Franciele Marques Vanderlei
• Grantee: Enzo Vinicius Corrêa de Oliveira
• Host Institution: Faculdade de Ciências e Tecnologia (FCT). Universidade Estadual Paulista (UNESP). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil

Abstract

Introduction: blood flow restriction (RFS) is a technique increasingly used in resistance exercises, being effective for improving strength, hypertrophy and muscular endurance in low-intensity exercises. Recently, a new method called Tissue Flossing (TF) was introduced, using an elastic latex band (floss band) to apply RFS in a more practical and accessible way. ET shows potential to improve strength and hypertrophy, however, more research is needed to analyze the behavior of muscle viscoelastic properties after ET, as well as understand whether they can have an impact on these musculoskeletal gains. Objective: to evaluate the behavior of muscle strength and hypertrophy after training with practical blood flow restriction (TF) and correlate them with muscle viscoelastic properties (muscle tone, stiffness and elasticity). Method: randomized controlled clinical trial with parallel groups, consisting of 34 participants who will be divided into two groups, namely: group 1 (Traditional RFS) and group 2 (TF RFS). Participants will be evaluated for fifteen weeks, in the first week they will undergo an initial assessment where anthropometric assessments, determination of POT, myotonometry, ultrasound and 1 repetition maximum test (RM) will be carried out. In the second week, a training protocol for the lower limb (MI) will begin, which will last twelve weeks, with three sessions per week, where myotonometric outcomes will be evaluated before and after the end of each session. In the eighth week there will be a break in training, as the intermediate assessment will be carried out where ultrasound, the 1RM test and myotonometry will be carried out and, after that, the final six weeks of training will continue. One week after the end of the training, final assessments will be carried out, measuring the same parameters initially assessed. Statistical analysis will use normality tests, Generalized Mixed Models and effect size analysis in SPSS software, with a significance level of p<0.05.