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]
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 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 Group:||Clinical Health (Organs, Diseases and Abnormal Conditions)|
|Objective Field:||Cardiovascular System and Diseases|
|Author:||Sharman, JE (Associate Professor James Sharman)|
|Deposited By:||Menzies Institute for Medical Research|
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