Eight Weeks of Interval Training Led to no Improvement in Cardiovascular Variables in the Elderly

Leandro de Oliveira Sant’Ana1, 2, 3, *, Jeferson Macedo Vianna1, 2, Natália Rodrigues dos Reis1, 2, Aline Aparecida de Souza Ribeiro1, 2, Bruno de Oliveira Soares4, Jefferson da Silva Novaes5, Fabiana Rodrigues Scartoni3, Sérgio Machado6, 7
1 Postgraduate Program in Physical Education, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil.
2 Strength Training Studies and Research Laboratory, Federal University of Juiz de Fora, Juiz de Fora, MG, Brazil
3 Laboratory of Sport and Exercise Sciences, Catholic University of Petrópolis, Petrópolis, RJ, Brazil
4 Department of Physical Education, Estácio de Sá University, Petrópolis, RJ, Brazil
5 Postgraduate Program in Physical Education, Federal University of Rio de Janeiro, Brazil
6 Laboratory of Physical Activity Neuroscience, Salgado de Oliveira University, Niterói, Brazil
7 Laboratory of Physical Activity Neuroscience, Neurodiversity Institute, Queimados, RJ, Brazil

© 2020 Sant’Ana et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Post-graduate Program in Physical Education, Federal University of Juiz de Fora, Brazil; Tel: 24992087699; E-mail:



Interval training is a method with high acceptance in prescription to increase health and can be an essential intervener in improving cardiovascular function.


This study aimed to verify the effects of eight weeks of interval training with different intensities on hemodynamic and autonomic function, which were assessed through resting heart rate, blood pressure, dual product, and heart rate variability.


The sample consisted of 24 older men (age: 68.8 ± 6.8 years, body mass: 74.4 ± 18.1 kg, height: 1.70 ± 0.8 m; BMI: 25.1 ± 2, 2) who were physically active. Participants were randomized into 3 experimental groups: training group A (TGA, n = 8), training group B (TGB, n = 8) and control group (CG, n = 8). For trained groups, interventions were developed twice a week for eight weeks, with an interval of 48 hours between the sessions. The evaluations were carried out at the pre (baseline) and after the eighth week of intervention. The control group did not perform any intervention. The variables were analyzed for 10 minutes with subjects at rest in the sitting position before and after the intervention. Statistics with a significance level of p <0.05 were applied.


After the intervention, no statistically significant results were found in the variables assessed (p> 0.05).


The intervention was not sufficient to promote statistical differences in hemodynamic and autonomic variables.

Keywords: Interval Training, Hemodynamic Response, Autonomic Response, Cardiovascular Variables, Cardiovascular Health, Elderly.