Evaluating the progressive cardiovascular health benefits of short term high intensity interval training

Holloway, Kathryn and Roche, Denise and Angell, Peter J. (2018) Evaluating the progressive cardiovascular health benefits of short term high intensity interval training. European Journal of Applied Physiology, 118 (10). pp. 2259-2268. ISSN 1439-6319 (Accepted for Publication)

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Official URL: https://link.springer.com/article/10.1007/s00421-0...

Abstract

Purpose High-intensity training is recognised as a time-efficient way of improving aerobic fitness. However, there is a lack of consensus regarding the temporal nature of adaptation response and which peripheral and cardiac changes occur using the same exercise stimulus and protocol. Therefore, this study aimed to evaluate the progression of vascular and cardiac changes over a 6-week training period. Methods Twelve healthy males (age 21 ± 2 years; 42.5 ± 8.3 ml min−1 kg−1) participated in a high-intensity training programme consisting of 1-min sprints, interspersed with 2 min active recovery, 3 days/week for 6 weeks on a cycle ergometer. Cardiac, vascular, blood lipids and VO2max measurements were taken at 0, 3 and 6 weeks and compared against a participant matched control group (age 21 ± 2 years; 37.7 ± 8.3 ml min−1 kg−1). Results There was a significant improvement in VO2max (42.5 ± 8.3–47.4 ± 8.5 ml min−1 kg−1; p = 0.009) in the training group and a significant decrease in systolic blood pressure (8%) from 0 to 6 weeks (p = 0.025). There was a small yet significant decrease in ejection fraction and increased end-systolic volume in both groups over time (p = 0.01) with no significant interaction effect (p > 0.05). A between-group difference in peak velocity of early diastolic mitral annular motion was also observed (p = 0.01). No improvements were seen in blood lipid profiles, central arterial stiffness and cardiometabolic risk score. Conclusions Six weeks of high-intensity training increases aerobic fitness and is enough to stimulate initial reductions in peripheral pressure, but not sufficient to elicit structural and functional cardiac changes, reduce arterial stiffness or lower CV risk.

Item Type: Article
Additional Information and Comments: This is the author's version of an article that was accepted for publication. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in the European Journal of Applied Physiology, Vol 118, Issue 10, October 2018, available from: https://link.springer.com/article/10.1007/s00421-018-3952-6
Keywords: high-intensity, exercise training, cardiac function, vascular structure, cardiovascular risk
Faculty / Department: Faculty of Science > School of Health Sciences
Depositing User: Kat Holloway
Date Deposited: 15 Oct 2018 10:47
Last Modified: 18 Dec 2018 12:35
URI: http://hira.hope.ac.uk/id/eprint/2606

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