Efeito autonômico de treinamento resistido com e sem restrição de fluxo sanguíneo em indivíduo com e sem síncope vasovagal: estudo de caso

Abstract

This research has the objective to understand the sympathovagal behavior of a individual with and without vasovagal syncope, during resistance training sessions performed with and without blood flow restriction. For this, a case study was conducted with two 22-year-old female individuals, identified as dizygotic twins, where only one of them has a positive diagnosis for vasovagal syncope, being the mixed type. The study was conducted at the Companhia Athletica Academy in Curitiba, PR. Both were submitted to the same training protocol in the leg press apparatus during 4 meetings, where alternating sessions of traditional resisted exercise and with blood flow restraint were performed, being monitored by the heart rate variability. Posteriorly, the results were converted and analyzed by time domain and frequency domain indexes. It was observed that the resistance exercise applied with RFS in comparison with the traditional form showed an increase of RR Average, demonstrating that exercise generated a regenerative effect, as well as activation of the parasympathetic system identified by means of the decrease of the LF / HF index and increase of the parameters RMSSD and pNN50. Likewise, the indexes related to SBP and DBP presented reduced values post session, indicating that the intervention via stimulation with occlusion had a relaxation effect from the point of view of BP and HRV.