Efeito de Diferentes Estrategias de Treinamento Aeróbio na Modulação Autonômica Cardíaca de Pessoas Sedentárias com Sobrepeso e Obesidade

• Autor(a) principal: Pessoa, Felipe de Azevedo
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/39394
• topic: VFC; Excesso de Peso; Exercício

Introduction: Among the many negative health conditions associated with overweight, there is a low heart rate variability (HRV), which in turn reflects a high risk of cardiovascular disease morbidity and mortality. Faced with this problem, physical exercise has been shown to be an effective strategy to reverse this condition in overweight people. However, it is still unclear which training method is most effective in improving HRV in overweight people. Objective: To evaluate the effect of continuous moderate training (CMT), high intensity interval training (HIIT) and self-selected intensity training (SEF) in HRV of apparently healthy overweight individuals in a 4-week training program in one outdoor environment. Methods: 73 adults were randomized into three groups: TMC, HIIT and TIA. Only those individuals who had <5% of artifacts in one of the heart rate records, who had a training frequency ≥75%, and who did not abandon the intervention were included for HRV analysis. After exclusion of the individuals that did not fit the analysis criteria, 38 adults remained, 16 in CMT (11 women and 5 men, BMI 31.19 ± 6.82), 15 in SEF (11 women and 4 men, IMC31, 19 ± 6,37s) and 7 in HIIT (3 women and 4 men, BMI 32.88 ± 2.48). The training was performed three times a week, for four weeks on an athletic track. At the CMT participants were instructed to exercise at the subjective perception of effort (PSE) of 13 (6-20 of the Borg scale) for 30 minutes. At HIIT, the subjects were instructed to perform 10 stimuli of 60 seconds in PSE of 15-17, interspersed with 60 seconds of active recovery. In the SEF, the participant was allowed to select the intensity from the following instruction: "Select a speed to perform 30 minutes of exercise". Heart rate records for HRV analysis were taken before the intervention and after 4 weeks of training. The non-parametric data were transformed into base 10 logarithms. The two-way ANOVA of repeated measurements followed by the Bonferroni post hoc was used to verify the group effect, time and the group x time interaction for the HRV and VO2 indices maximum, BMI (p <0.05). Results: No interaction of group x time was observed for maximal VO2, BMI, resting heart rate (HRR), RR INTERVAL, SDNN, RMSSD, LF, HF and LF / HF. There was time effect only on the mean RR intervals in the HIIT group (p = 0.04). In the TMC group, there was a significant increase in mean RR intervals (p = 0.01), SDNN (p <0.01), RMSSD (p = 0.04) and LF (p <0.01). Finally, the SEF group showed a significant increase after 4 weeks in the mean RR intervals (p = 0.05), DSNN (p = 0.01), LF (p = 0.04) and HF (p = 0.01), and presented a decrease in HRR (p = 0.03). Conclusion: TMC and TIA group, were effective in increasing HRV in overweight individuals.