Abstract
Objective
The effect of 12 weeks of high-intensity intermittent exercise (HIIE) on cardiac, vascular, and autonomic function of young males was examined.
Methods
Thirty-eight young men with a BMI of 28.7 ± 3.1 kg m−2 and age 24.9 ± 4.3 years were randomly assigned to either an HIIE or control group. The exercise group underwent HIIE three times per week, 20 min per session, for 12 weeks. Aerobic power and a range of cardiac, vascular, and autonomic measures were recorded before and after the exercise intervention.
Results
The exercise, compared to the control group, recorded a significant reduction in heart rate accompanied by an increase in stroke volume. For the exercise group forearm vasodilatory capacity was significantly enhanced, P < 0.05. Arterial stiffness, determined by pulse wave velocity and augmentation index, was also significantly improved, after the 12-week intervention. For the exercise group, heart period variability (low- and high-frequency power) and baroreceptor sensitivity were significantly increased.
Conclusion
High-intensity intermittent exercise induced significant cardiac, vascular, and autonomic improvements after 12 weeks of training.
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Acknowledgments
We would like to thank Chau Tran, Joshua Lane, Roger Burrell, and Lucas Webb for help with data collection. This study was supported by the Diabetes Australia Research Trust (Grant # RM06599).
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None of the authors had a personal or financial conflict of interest.
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Heydari, M., Boutcher, Y.N. & Boutcher, S.H. High-intensity intermittent exercise and cardiovascular and autonomic function. Clin Auton Res 23, 57–65 (2013). https://doi.org/10.1007/s10286-012-0179-1
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DOI: https://doi.org/10.1007/s10286-012-0179-1