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Moderate and heavy metabolic stress interval training improve arterial stiffness and heart rate dynamics in humans

Rakobowchuk, Mark, Harris, Emma, Taylor, Annabelle, Cubbon, Richard M. and Birch, Karen M. (2012) Moderate and heavy metabolic stress interval training improve arterial stiffness and heart rate dynamics in humans. European Journal of Applied Physiology, 113 (4). pp. 839-849. ISSN 1439-6327

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Abstract

Traditional continuous aerobic exercise training attenuates age-related increases of arterial stiffness, however, training studies have not determined whether metabolic stress impacts these favourable effects. Twenty untrained healthy participants (n = 11 heavy metabolic stress interval training, n = 9 moderate metabolic stress interval training) completed 6 weeks of moderate or heavy intensity interval training matched for total work and exercise duration. Carotid artery stiffness, blood pressure contour analysis, and linear and non-linear heart rate variability were assessed before and following training. Overall, carotid arterial stiffness was reduced (p < 0.01), but metabolic stress-specific alterations were not apparent. There was a trend for increased absolute high-frequency (HF) power (p = 0.10) whereas both absolute low-frequency (LF) power (p = 0.05) and overall power (p = 0.02) were increased to a similar degree following both training programmes. Non-linear heart rate dynamics such as detrended fluctuation analysis (|1−α1|)(|1−α1|) also improved (p > 0.05). This study demonstrates the effectiveness of interval training at improving arterial stiffness and autonomic function, however, the metabolic stress was not a mediator of this effect. In addition, these changes were also independent of improvements in aerobic capacity, which were only induced by training that involved a high metabolic stress.

Item Type: Article
Uncontrolled Keywords: Heart rate variability, Arterial compliance, Exercise training, Arterial stiffness, Heart rate modulation, Interval
Subjects: Q Science > Q Science (General)
Q Science > QP Physiology
Schools: School of Human and Health Sciences
Related URLs:
Depositing User: Emma Harris
Date Deposited: 11 May 2017 14:39
Last Modified: 11 May 2017 20:19
URI: http://eprints.hud.ac.uk/id/eprint/29536

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