PERFORMANCE BEHAVIOR AND ITS RELATIONSHIP WITH CLINICAL AND PERCEPTIVE RESPONSES AFTER WARMING UP WITH BLOOD FLOW RESTRICTION: A CROSSOVER CONTROLLED CLINICAL TRIAL

• Grant number: 23/11897-3
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: March 01, 2024
• End date: December 31, 2024
• Field of knowledge: Health Sciences - Physiotherapy and Occupational Therapy
• Principal Investigator: Franciele Marques Vanderlei
• Grantee: Gabriel Oliveira da Silva
• Host Institution: Faculdade de Ciências e Tecnologia (FCT). Universidade Estadual Paulista (UNESP). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil

Abstract

Introduction: Warming up is based on a general preparation of the body before starting a certain physical or sports activity, which aims to reach an ideal physical state. When performed at progressive and gradual intensity, it allows the body to adapt to physiological responses and, consequently, enhance performance in the activity performed. In this context, pain, perceived exertion and body temperature outcomes can be analyzed in terms of their relationship to performance optimization. In addition, the application of the blood flow restriction technique (BFR) associated with heating appears as a possible way to optimize the physiological effects already generated by this process. Objectives: to analyze and compare the effects generated on performance (vertical jump test and 30-meter sprint test) after warming up with RFS and correlate it with clinical (temperature) and perceptual (VAS, CR-10 and algometer) outcomes. Methods: A crossover clinical trial will be carried out with 108 amateur soccer players aged between 18 and 35 years, randomly divided into three groups: low-intensity warm-up without RFS (30% VO2max), high-intensity warm-up without RFS (80% VO2max ) and low-intensity warm-up associated with RFS (80% of total occlusion pressure) [30% VO2max-RFS]. All groups will perform the warm-up protocol on an ergometric treadmill and the outcomes will be evaluated at baseline and immediately after the end of the warm-up, as well as 10 and 20 minutes after its completion. Descriptive statistics will be used, comparisons will be made by analysis of variance and correlations through the Pearson or Spearman correlation test with a significance level of p<0.05. Expected results: it is hypothesized that for the intervention group with RFS, it will be possible to observe correlations between body temperature and perceptual outcomes, as in addition to generating an increase in body temperature through the physiological effects resulting from greater heat production by the muscle , this intervention will also provide adaptations without causing major muscle damage, which will consequently minimize responses related to pain and the individual's perception of exertion, allowing him to be conditioned for his practice, and with better results in performance outcomes.