Open AccessThe Influence of an Acute Bout of High-Intensity Interval Exercise on Heart Rate Variability Indices and Stress Index in the Absence of Cardiometabolic Diseases
Author(s) -
Ricardo Torres,
Kathleen A. Richardson,
Catherine Lowry,
Cassidy Beeson,
Ahmed Ismaeel,
Panagiotis Koutakis,
Jeffrey S. Forsse
Publication year - 2022
Publication title -
research directs in health sciences
Language(s) - English
Resource type - Journals
ISSN - 2768-492X
DOI - 10.53520/rdhs2022.10430
Subject(s) - cardiorespiratory fitness , heart rate variability , medicine , heart rate , cardiology , physical therapy , vo2 max , blood pressure
The maximal rate of oxygen consumption is the gold standard when determining cardiorespiratory fitness (CF) in healthy and diseased populations. CF has been shown to influence the improvement of cardiac autonomic modulation (CAM) and lower the risk of morbidity and mortality rates. High-intensity interval exercise (HIIE) has been shown to influence CAM post-exercise in various populations. Heart rate variability (HRV) is a non-invasive way to assess CAM during, before, and after exercise. The purpose was to determine if a single acute bout of HIIE is influenced by age and CF when correlated to HRV variables to determine CAM in healthy and fit individuals.Methods: Thirty-four healthy individuals (n= 21 male; n = 13 female) completed a single acute bout of HIIE session to quantify CAM via HRV. HRV was assessed pre, 1-hour, and 24-hours post-exercise using time and frequency domains, and stress index (SI).Results: HRV time and frequency domains were not significantly changed. The SI was significantly different between pre, 1-hour, and 24-hours post-exercise (p = 0.001). The SI was also significantly different between age groups (p = 0.025).Conclusion: The lack of significant difference in CAM can be attributed to the participants high CF, which helps maintain their HRV as they age. Additionally, the SI appears to be a good metric to assess CF as individuals age.