High intensity interval training (HIIT) improves resting blood pressure, metabolic (MET) capacity and heart rate reserve without compromising cardiac function in sedentary aging men
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Authors
Grace, FergalHerbert, Peter
Elliot, Adrian D.
Richards, Joanna C.
Beaumont, Alexander
Sculthorpe, Nicholas
Affiliation
Federation UniversityUniversity of Wales Trinity Saint David
University of Adelaide
University of Bedfordshire
University of the West of Scotland
Issue Date
2017-05-13Subjects
cardiorespiratory fitnesscardiac risk-factors
high intensity exercise
high intensity interval training
HIIT
ageing
C600 Sports Science
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Background: This study examined a programme of pre-conditioning exercise with subsequent high intensity interval training (HIIT) on blood pressure, echocardiography, cardiac strain mechanics and maximal metabolic (MET) capacity in sedentary (SED) aging men compared with age matched masters athletes (LEX). Methods: Using a STROBE compliant observational design, 39 aging male participants (SED; n=22, aged 62.7± 5.2 yrs) (LEX; n = 17, aged= 61.1 ± 5.4 yrs) were recruited to a study that necessitated three distinct assessment phases; enrolment (Phase A), following pre-conditioning exercise in SED (Phase B), then following 6 weeks of HIIT performed once every five days by both groups before reassessment (Phase C). Hemodynamic, echocardiographic and cardiac strain mechanics were obtained at rest and maximal cardiorespiratory and chronotropic responses were obtained at each measurement phase. Results: The training intervention improved systolic, mean arterial blood pressure, rate pressure product and heart rate reserve (each P b 0.05) in SED and increased MET capacity in both SED and LEX (P b 0.01) which was amplified by HIIT. Echocardiography and cardiac strain measures were unremarkable apart from trivial increase to intra-ventricular septum diastole (IVSd) (P b 0.05) and decrease to left ventricular internal dimension diastole (LVId) (P b 0.05) in LEX following HIIT. Conclusions: A programme of preconditioning exercise with HIIT induces clinically relevant improvements in blood pressure, rate pressure product and encourages recovery of heart rate reserve in SED, while improving maximal MET capacity in both SED and LEX without inducing any pathological cardiovascular remodeling. These data add to the emerging repute of HIIT as a safe and promising exercise prescription to improve cardiovascular function and metabolic capacity in sedentary aging.Citation
Grace F, Herbert P, Elliot A D, Richards J, Beaumont A, Sculthorpe N. (2018) 'High intensity interval training (HIIT) improves resting blood pressure, metabolic (MET) capacity and heart rate reserve without compromising cardiac function in sedentary aging men', Experimental Gerontology, 109 (), pp.75-81.Publisher
ElsevierJournal
Experimental GerontologyPubMed ID
28511954Additional Links
https://www.sciencedirect.com/science/article/pii/S0531556516306003Type
ArticleLanguage
enISSN
0531-5565ae974a485f413a2113503eed53cd6c53
10.1016/j.exger.2017.05.010
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