Repercussão do exercício intervalado de alta intensidade sobre o controle nervoso autonômo cardíoco em obesos

Abstract

Obese individuals have engaged cardiac autonomic modulation, one way to assess the modulation is through heart rate variability, considered an important marker of cardiometabolic health. Physical exercise promotes improvements in autonomic function. Objective: To compare the response of cardiac autonomic modulation in obese patients, grade I and II, to a high intensity interval exercise session. Methodology: Participants were 9 obese individuals of both sexes, divided into two groups, according to the degree of obesity, grade 1 (n = 4) and grade 2 (n = 5). Heart rate variability was assessed after the experimental session. Results: The OB1 group presented a post-10 vagal decrease and an increase in sympathetic tone, results similar to those of Post 60. In the OB2 group, there was an increase in the sympatho-vagal balance at the moments Post 10 and Post 60, parallel to a parasympathetic decrease. In the comparison of the groups, a better response to exercise at the time Post 10 was observed for the OB1 group. Conclusions: The sympathovagal balance is increased in obese individuals, regardless of the degree of obesity, in the resting condition and after a high-intensity interval exercise session, indicating a sympathetic predominance in autonomic modulation. The parasympathetic activity is more compromised in the obesity group 2, where even after 60 minutes, there was no return to the Pre-intervention values. The grade 1 obesity group had a better response to exercise than the grade 2 obesity group, especially at the post-10 time point.