Acute effects of exercise resistance in the recovery of different intensities cardiac autonomic modulation assets in young and healthy

• Grant number: 13/10930-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: August 01, 2013
• End date: July 31, 2014
• Field of knowledge: Biological Sciences - Physiology - Physiology of Effort
• Principal Investigator: Luiz Carlos Marques Vanderlei
• Grantee: Bruno Massayuki Makimoto Monteiro
• Host Institution: Faculdade de Ciências e Tecnologia (FCT). Universidade Estadual Paulista (UNESP). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil

Abstract

Introduction: There are gaps in the literature regarding the recovery period of resistance training and information regarding the effect of exercise on the recovery of the autonomic nervous system (ANS) are scarce. Objective: To analyze the behavior of the SNA by means of heart rate recovery (HRR) and heart rate variability (HRV), in the immediate recovery after the execution of an acute bout of resistance exercise at different intensities and the same segment body. Method: We will analyze data from 20 young healthy male (PAR-Q) and active (IPAQ), which will be submitted to a protocol consists of three steps. The first test will be performed one-repetition maximum (1RM) for lower and subsequent steps will be two protocols: endurance (40% of 1RM - 2 sets of 20 repetitions) and strength (80% of 1RM - 2 sets of 8 repetitions). From the record of the beat to beat heart rate (Polar S810i heart rate monitor), will be obtained indices of HRV in the time domain (RMSSD) and frequency [HF, LF (ms2 and nu) and LF / HF ratio] during the rest and recovery, which will have their set times according to the index in question. The FCR is calculated as the difference between the values obtained in the first two minutes with the value of the peak heart rate. Data will be analyzed using ANOVA for repeated measures two-way considering protocol (endurance and strength) and moments (moments of rest and recovery) followed by post-test when significant. The significance level is 5%.