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

Citation

Ramos, JS and Dalleck, LC and Ramos, MV and Borrani, F and Roberts, L and Gomersall, S and Beetham, KS and Dias, KA and Keating, SE and Fassett, RG and Sharman, JE and Coombes, JS, 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. ISSN 0263-6352 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 Wolters Kluwer Health

DOI: doi:10.1097/HJH.0000000000001034

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 [n = 17, 30 min at 60-70% peak heart rate (HRpeak), five times/week]; 4  4-min high-intensity interval training (4HIIT) (n = 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) (n = 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) = 2.9, P = 0.07, η 2= 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 = 0.03; MICT 29  9-28  8, P = 0.78; 4HIIT 28  10-30  9 mmHg, P = 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.

Item Details

Item Type:Refereed Article
Keywords:aorta, interval training, vascular function
Research Division:Medical and Health Sciences
Research Group:Cardiorespiratory Medicine and Haematology
Research Field:Cardiology (incl. Cardiovascular Diseases)
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Cardiovascular System and Diseases
Author:Sharman, JE (Professor James Sharman)
ID Code:115283
Year Published:2016
Web of Science® Times Cited:2
Deposited By:Menzies Institute for Medical Research
Deposited On:2017-03-14
Last Modified:2017-11-03
Downloads:0

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