The basal autonomic balance and during isometric exercise in young people with different cardiovascular reactivity

Autores/as

  • Alexis Rodríguez Pena Biomedical Research Unit. Villa Clara Medical Science University
  • Otmara Guirado Blanco Biomedical Research Unit. Villa Clara Medical Science University
  • Héctor Jesús González Paz Biomedical Research Unit. Villa Clara Medical Science University
  • José CArlos Casas Blanco Biomedical Research Unit. Villa Clara Medical Science University

Palabras clave:

Cardiovascular hyperreactivity, Heart rate variability, isometric sustained weight test, hypertension

Resumen

Introduction: the autonomic nervous system plays an important role in cardiovascular readjustments to exercise. In cardiovascular hyperreactivity there is a greater sensitivity of the sympathetic system to different stressors.  Objective: to determine the characteristics of cardiac autonomic control in young adults with different degrees of cardiovascular reactivity at rest and during isometric exercise. Material and Methods: the sample consisted of 97 individuals of both sexes, it was divided into three groups; normorreactives, hyperreactive and with hypertensive response according to the pressor response to the sustained weight test. All individuals underwent a variability study of heart rate at rest and during the isometric test. Variables in the frequency domain were studied: HF, LF, resting LF/HF ratio and the parameters of the Poincaré diagram SD1, SD2 and the SD1/SD2 ratio at rest and during exercise.  Results: At the basal state, hyperreactive individuals and with a hypertensive response had a sympathetic predominance over cardiac function and a lower variability of heart rate. During isometric exercise the values of the SD1 and SD2 axes decreased in all groups and the SD1/SD2 ratio decreased in normorreactive individuals and with hypertensive response, but it was only significantly in the hyperreactive ones. Conclusions: In individuals with cardiovascular hyperreactivity, an autonomic imbalance is already present in the basal state and there is a reduction in autonomic vagal modulation during exercise that may contribute to the development of hypertension.

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Publicado

2020-01-28

Cómo citar

1.
Rodríguez Pena A, Guirado Blanco O, González Paz HJ, Casas Blanco JC. The basal autonomic balance and during isometric exercise in young people with different cardiovascular reactivity. Rev Cubana Inv Bioméd [Internet]. 28 de enero de 2020 [citado 31 de agosto de 2025];38(5). Disponible en: https://revibiomedica.sld.cu/index.php/ibi/article/view/571