12min/week of high-intensity interval training reduces aortic reservoir pressure in individuals with metabolic syndrome: a randomized trial

Journal article


Ramos, Joyce, Dalleck, Lance, Ramos, Maximiano, Borrani, Fabio, Roberts, Llion, Gomersall, Sjaan, Weston, Kassia S., Dias, Katrin, Keating, Shelley, Fassett, Robert, Sharman, James E. and Coombes, Jeff S.. (2016). 12min/week of high-intensity interval training reduces aortic reservoir pressure in individuals with metabolic syndrome: a randomized trial. Journal of Hypertension. 34(10), pp. 1977 - 1987. https://doi.org/10.1097/HJH.0000000000001034
AuthorsRamos, Joyce, Dalleck, Lance, Ramos, Maximiano, Borrani, Fabio, Roberts, Llion, Gomersall, Sjaan, Weston, Kassia S., Dias, Katrin, Keating, Shelley, Fassett, Robert, Sharman, James E. and Coombes, Jeff S.
Abstract

Objective: Decreased aortic reservoir function leads to a rise in aortic reservoir pressure that is an independent predictor of cardiovascular events. Although there is evidence that high-intensity interval training (HIIT) would be useful to improve aortic reservoir pressure, the optimal dose of high-intensity exercise to improve aortic reservoir function has yet to be investigated. Therefore, this study compared the effect of different volumes of HIIT and moderate-intensity continuous training (MICT) on aortic reservoir pressure in participants with the metabolic syndrome (MetS). Methods: Fifty individuals with MetS were randomized into one of the following 16-week training programs: MICT [n¼ 17, 30 min at 60–70% peak heart rate (HRpeak), five times/week]; 4 4-min high-intensity interval training (4HIIT) (n¼ 15, 4 4 min bouts at 85–95% HRpeak, interspersed with 3 min of active recovery at 50–70% HRpeak, three times/week); and 1 4-min high-intensity interval training (1HIIT) (n¼ 18, 1 4 min bout at 85–95% HRpeak, three times/week). Aortic reservoir pressure was calculated from radial applanation tonometry. Results: Although not statistically significant, there was a trend for a small-to-medium group time interaction effect on aortic reservoir pressure, indicating a positive adaptation following 1HIIT compared with 4HIIT and MICT [F (2,46) ¼ 2.9, P ¼ 0.07, h2¼ 0.06]. This is supported by our within-group analysis wherein only 1HIIT significantly decreased aortic reservoir pressure from pre to postintervention (pre–post: 1HIIT 33 16 to 31 13, P ¼ 0.03; MICT 29 9–28 8, P ¼ 0.78; 4HIIT 28 10– 30 9 mmHg, P ¼ 0.10). Conclusion: Three sessions of 4 min of high-intensity exercise per week (12 min/week) was sufficient to improve aortic reservoir pressure, and thus may be a time-efficient exercise modality for reducing cardiovascular risk in individuals with MetS.

Year2016
JournalJournal of Hypertension
Journal citation34 (10), pp. 1977 - 1987
PublisherLippincott Williams & Wilkins
ISSN0263-6352
Digital Object Identifier (DOI)https://doi.org/10.1097/HJH.0000000000001034
Scopus EID2-s2.0-84979966581
Page range1977 - 1987
Research GroupSports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre
Publisher's version
File Access Level
Controlled
Place of publicationUnited Kingdom
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