Brian Johan Bustos-Viviescas, Luis Alfredo Duran-Luna, Andres Alonso Acevedo-Mindiola, Carlos Enrique Garcia Yerena, Rony David Merchan Osorio, Gloria Cristina Cardenas Gonzalez
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Modifications Of The Non-Linear Parameters Of The Heart Rate Variability Related To The Systematic Practice Of Physical Exercise

Introduction:  In recent  years,  the relationship  between  the systematic  practice  of physical  exercise,  cardiovascular  dynamics  and  the  functioning  of  the  autonomic nervous system has been recognized.

Objective: To determine the modifications that non-linear parameters undergo in the autonomic cardiovascular regulation of the heart rate variability with the systematic practice of physical exercise.

Methods: A retrospective cohort analytical study was conducted from February 2016 to August 2018. Population and sample: 36 individuals (Group 1: 18 high- performance baseball athletes; Group 2:  18 medical students). The  data  were collected  in  the  Biomedical  Basic  Sciences  Laboratory  at  Medical  school  1, University  of Santiago  de Cuba,  through  the 8-channel  PowerLab  polygraph,  and stored using the Kubios Software version 3.0.4 Premium.

Results: Statistically significant differences between means were found in heart rate values (p = 0.000); SD1 (p = 0.025); SD2/SD1 ratio (p = 0.007); sample entropy (p = 0.011); short-term fluctuations α 1 (p = 0.019); mean line length (p = 0.016); max line length (p = 0.001); recurrence rate (p = 0.034); determinism (p = 0.010) and Shannon entropy (p = 0.015). The parameters of SD1 (C = 0.906) and sample entropy (C = 0.712) were significantly associated with a heart rate ≤ 70 beats per minute.

Conclusions: With the systematic practice of physical exercise, the non-linear parameters of the autonomic cardiovascular regulation of the heart rate variability undergoes modifications that respond to a better adaptability of the autonomic nervous system, and to a greater capacity to regulate cardiovascular function.
Victor Ernesto González-Velázquez, Lázaro Ibraín Cobiellas-Carballo, Roxana María Rebustillo-Escobar, Walfrido Semanat-Gabely, David de Jesús Bueno-Revilla, Erislandis López-Galán, Miguel Enríquez Sánchez-Hechavarría, Salvador Escalante Batista
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Alex Omar Franco Lacato
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Modifications of the non-linear parameters of the heart rate variability related to the systematic practice of physical exercise

Introduction: In recent years the relationship between the systematic practice of physical exercise, cardiovascular dynamics and the functioning of the autonomic nervous system has been recognized. Objective: To determine the modifications that nonlinear parameters undergo in the autonomic cardiovascular regulation of the heart rate variability with the systematic practice of physical exercise. Methodological Design: Retrospective cohort analytical study in the period from February 2016 to August 2018. Universe and sample of 36 individuals (Group 1: 18 high performance baseball athletes, Group 2: 18 students from the University of Medical Sciences of Santiago de Cuba). The data were collected in the Biomedical Basic Sciences Laboratory of the University's Faculty 1, through the 8-channel PowerLab polygraph, and stored using the Kubios Software version 3.0.4 Premium.
Results: Statistically significant differences were found in heart rate values (p = 0.000); SD1 (p = 0.025); SD2 / SD1 ratio (p = 0.007); sample entropy (p = 0.011); short-term fluctuations alpha 1 (p = 0.019); linear average length (p = 0.016); linear maximum length (p = 0.001); recurrence rate (p = 0.034); determinism (p = 0.010) and Shannon entropy (p = 0.015). The parameters of SD1 (C = 906) and sample entropy (C = 712) were significantly associated with a heart rate ≤ 70 beats / min. Conclusions: With the systematic practice of physical exercise, the non-linear dynamics of the autonomic cardiovascular regulation of the heart rate variability undergoes modifications that respond to a better adaptability of the autonomic nervous system, and to a greater capacity to regulate cardiovascular function.

Víctor Ernesto González-Velázquez, Roxana María Rebustillo-Escobar, Walfrido Semanat-Gabely, Lázaro Cobiellas-Carballo, Miguel Enrique Sánchez-Hechavarría
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