Análise da variabilidade da frequência cardíaca de corredoras amadores de Manaus/Am

Abstract

Heart rate variability (HRV) is widely used in research to assess the functioning of the autonomic nervous system (ANS) and has various applications related to human well being. By monitoring it, it is possible to identify and evaluate variables associated with an individual's health indices. The general aim of this study was to analyze HRV during an incremental treadmill test, observing the behavior of the autonomic nervous system in response to the stress imposed during the test. Amateur runners from the Federal University of Amazonas were selected. The participants had their HRV variables recorded during the incremental test using a Polar H10 cardiac transmitter, and the data was obtained from the RR interval recordings. The domains of time (RMSSD, mean RR, mean HR and stress index), frequency (LF and HF) and non-linear methods (SD1 and SD2) were analyzed. The data was compared, normalized and analyzed in relation to the resting values obtained before the start of the incremental test using the One Way ANOVA test, with p-values ≤ 0.05 being considered significant. Translated with DeepL.com (free version) The reduction in Sd1 and Sd2 variables after exercise can be attributed to sympathetic activation and parasympathetic suppression, which is expected in response to physical stress. These results highlight the importance of assessing HRV as an indicator of autonomic adaptation to exercise.