Effects of training associated with recovery hypoxia and tapering on hematological, autonomic, aerobic and anaerobic parameter in amateur runners

• Grant number: 20/04703-0
• Support type: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): October 01, 2020
• Effective date (End): April 30, 2022
• Field of knowledge: Health Sciences - Physical Education
• Principal researcher: Marcelo Papoti
• Grantee: Germano Marcolino Putti
• Home Institution: Escola de Educação Física e Esporte de Ribeirão Preto (EEFERP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

Considering the different ways of using hypoxia as an ergogenic resource and the different results found in the literature, the main objective of this study will be to compare the effects of intensive interval training associated with recovery in hypoxia (FiO2 = 13%) to the same training model performed exclusively in normoxia. The subjects (n = 26) will be divided into a normoxia group (NG, with efforts and recoveries in normoxia) and training associated with recovery in hypoxia (HRM, with efforts in normoxia and recoveries in hypoxia). The training sessions will have a frequency of 3.week-1 and will consist of 10 efforts of 1 minute at 120% of intensity of VO2máx, with 2 minutes of recovery between each effort. Before and after 6 weeks of training and one after a week of polishing the subjects will perform tests for body composition analysis, incremental test to determine maximum oxygen consumption (VO2max), vVO2max and anaerobic threshold, maximum accumulated oxygen deficit alternative (MAODal) and blood count, analyzing red cells (RBC), hematocrit (Hct) and hemoglobin (Hb). The autonomic response to recovery in hypoxia will also be assessed acutely, through the heart rate variability measured in the first session of each week. The normality and homogeneity of the data will be confirmed with the Shapiro-Wilk and Levene tests respectively. The different training conditions will be compared using the analysis of variance (ANOVA Two-way) followed, when necessary, by Tukey's post hoc test. The possible changes in the variables will be verified with the Pearson correlation test. In all cases, the level of significance will be pre-fixed at p <0.05.