Andrade RosárioNacha Samadi,de SouzaPerciliany Martins, AssunçãoPoliana Elisa, Pereira de OliveiraFernando Luiz, BearzotiEduardo, de Castro PintoKelerson Mauro,SouzaGabriela Guerra Leal.Resting heart rate variability in professors: Impact of psychological stress, obesity and blood pressure.Journal of Education, Health and Sport. 2021;11(5):11-25. eISSN 2391-8306. DOI http://dx.doi.org/10.12775/JEHS.2021.11.05.001 https://apcz.umk.pl/czasopisma/index.php/JEHS/article/view/JEHS.2021.11.05.001 https://zenodo.org/record/4733067 The journal has had 5 points in Ministry of Science and Higher Education parametric evaluation. § 8. 2) and § 12. 1. 2) 22.02.2019. © The Authors 2021; This article is published with open access at Licensee Open Journal Systems of Nicolaus Copernicus University in Torun, Poland Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author (s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non commercial license Share alike. (http://creativecommons.org/licenses/by-nc-sa/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited. The authors declare that there is no conflict of interests regarding the publication of this paper. Received: 21.04.2021. Revised: 26.04.2021. Accepted: 02.05.2021. Resting heart rate variability in professors: Impact of psychological stress, obesity and blood pressure MSc. Nacha Samadi Andrade Rosário1(nacha.rosario@aluno.ufop.edu.br), MSc. Perciliany Martins de Souza1(perciliany.souza@aluno.ufop.edu.br), Poliana Elisa Assunção1(popoelisa@gmail.com), PhD. Fernando Luiz Pereira de Oliveira2(fernandoluiz@ufop.edu.br), PhD. Eduardo Bearzoti2(eduardo.bearzoti@ufop.edu.br), PhD. Kelerson Mauro de Castro Pinto3(kelerson@ufop.edu.br), and PhD. Gabriela Guerra Leal Souza1(gabriela.souza@ufop.edu.br). Laboratory of Psychophysiology, Department of Biological Sciences, Federal University of Ouro Preto, Ouro Preto, Brazil Department of Statistics, Federal University of Ouro Preto, Ouro Preto,Brazil SchoolofPhysical Education, Federal University of Ouro Preto, Ouro Preto,Brazil Corresponding author: Gabriela Guerra Leal Souza; Federal University of Ouro Preto, Department of Biological Sciences, Campus Morro do Cruzeiro, Laboratory of Psychophysiology – Ouro Preto, Minas Gerais – Brasil. CEP 35400-000; e-mail: gabriela.souza@ufop.edu.br; +55 (31) 3559-1991 / (31) 9 8864-2549Email Abstract Objective:University professors are prone to show physical and psychological diseases related to excessive workload. Such overwork can affect the functioning of the autonomic nervous system, leading to a decrease in heart rate variability (HRV). HRV reflects the continuous fluctuation of the R-R intervals due to sympathetic and parasympathetic actions in the heart and is associated with good physical and psychological health.We aimed to evaluate whether psychological stress and anthropometric and clinical variables influence HRV at rest in professors. Methods:University professors of both sexes (N=65; 41 men) participated. We collected Anthropometry and Clinical variables, Psychological stress, and HRV parasympathetic parameters (square root mean squares of the differences between RR intervals: RMSSD, number of successive differences between RR intervals, which are > 50 ms: NN50 and high frequency – HF). Results:Four principal components (PCs) represented 68.29% of the data total variation. Principal component 1 (PC1) was called the good cardiac regulation component. PC2 was called the component of reduced stress symptoms. PC3 was named favorable working conditions component. PC4 was denominated component of labor and physiological deregulation. Each HRV parameter was associated with each PC through the use of regression models. The RMSSD was positively associated with PC2. The NN50 was positively associated with PC2 and PC3. HF was positively associated with PC3 and PC4. Conclusions:HRV parasympathetic parameters, which represent good physical and mental health, are positively associated with the components of reduced stress symptoms, favorable working conditions, and labor and physiological deregulation. Keywords: heart rate variability; stress; blood pressure; obesity; anthropometry;professors. Abstrata Objetivo:Professores universitários são propensos a apresentar doenças físicas e psicológicas relacionadas à carga horária excessiva.Esse excesso de trabalho pode afetar o funcionamento do sistema nervoso autônomo, levando a uma diminuição da variabilidade da frequência cardíaca (VFC).A VFC reflete a flutuação contínua dos intervalos RR devido às ações simpáticas e parassimpáticas no coração e está associada a uma boa saúde física e psicológica.Objetivamos avaliar se o estresse psicológico e as variáveis antropométricas e clínicas influenciam a VFC em repouso em professores.Métodos:Participaram professores universitários de ambos os sexos (N = 65; 41 homens).Coletamos variáveis antropométricas e clínicas, estresse psicológico e parâmetros parassimpáticos da VFC (raiz quadrada da média dos quadrados das diferenças entre os intervalos RR: RMSSD, número de diferenças sucessivas entre os intervalos RR, que são> 50 ms: NN50 e alta frequência - HF).Resultados:Quatro componentes principais (PCs) representaram 68,29% da variação total dos dados.O componente principal 1 (PC1) foi denominado componente de boa regulação cardíaca.PC2 foi chamado de componente de redução dos sintomas de estresse.O PC3 foi denominado componente de condições favoráveis de trabalho.PC4 foi denominado componente do parto e desregulamentação fisiológica.Cada parâmetro de VFC foi associado a cada PC por meio do uso de modelos de regressão.O RMSSD foi positivamente associado ao PC2.O NN50 foi associado positivamente com PC2 e PC3.HF associou-se positivamente com PC3 e PC4.Conclusões: Osparâmetros parassimpáticos da VFC, que representam boa saúde física e mental, estão positivamente associados aos componentes de redução dos sintomas de estresse, condições favoráveis de trabalho e desregulamentação fisiológica e laboral. Palavras-chave: variabilidade da freqüência cardíaca; estresse; pressão sanguínea; obesidade; antropometria; professores.