Short-Term High-Intensity Circuit Training Does Not Modify Resting Heart Rate Variability in Adults during the COVID-19 Confinement

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Issue Date
2022-06-16Author
García-Suárez, Patricia C.
Aburto-Corona, Jorge A.
Rentería, Iván
Gómez-Miranda, Luis M.
Moncada-Jiménez, José
Santos Lira, Fábio
Antunes, Barbara Moura
Jiménez-Maldonado, Alberto
Publisher
MDPI
Type
Article
Article Version
Scholarly/refereed, publisher version
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© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.
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Background/Objective: The quarantine caused by the COVID-19 pandemic increased sedentary behavior, psychological stress, and sleep disturbances in the population favoring the installation of alterations in the cardiovascular system. In this sense, physical exercise has widely been suggested as an efficient treatment to improve health. The current study determined the impact of short-term high-intensity circuit training (HICT) on resting heart rate variability (HRV) in adults. Methods: Nine healthy participants (age: 31.9 ± 4.4 yr.) performed 36 HICT sessions (3 times per day; 3 days per week) and four participants (age: 29.5 ± 1.7 yr.) were assigned to a control group. The HICT consisted of 12 min of whole-body exercises performed during a workout. Twenty-four hours before and after the exercise program, HRV parameters were recorded. Results: The heart rate exercise during the last session trended to be lower when compared with the first HICT session (p = 0.07, d = 0.39, 95% CI = −13.50, 0.72). The interval training did not modify the HRV time (Mean NN, SDNN, RMSSD, NN50, pNN50) and frequency (LF, HF, LF/HF ratio, total power) domain parameters. Conclusion: Thirty-six HICT sessions did not provide enough stimuli to modify the resting HRV in adults during social isolation elicited by the COVID-19 pandemic. However, the data suggested that exercise protocol did not induce cardio-vagal adaptations.
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García-Suárez, P.C.; Aburto-Corona, J.A.; Rentería, I.; Gómez-Miranda, L.M.; Moncada-Jiménez, J.; Lira, F.S.; Antunes, B.M.; Jiménez-Maldonado, A. Short-Term High-Intensity Circuit Training Does Not Modify Resting Heart Rate Variability in Adults during the COVID-19 Confinement. Int. J. Environ. Res. Public Health 2022, 19, 7367. https://doi.org/10.3390/ijerph19127367
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