Type

Conference Proceedings

Authors

Niall Moyna
Michael Harrison
Antony Wekesa
Mark Ross
Ronan Murphy
Paul O'Connor
Noel McCaffrey
Kevin O'Hara
Cleona Gray
Brona Furlong
and 3 others

Subjects

Physiotherapy & Sport

Topics
sports sciences endothelial function exercise high resolution coronary artery disease heart rate physical activity cad

Effect of self-regulated exercise intensity on endothelial function in men with coronary artery disease (2011)

Abstract Background: Physiologically based exercise prescriptions normally involve identifying an intensity range that elicits a predetermined VO2 or heart rate. In many instances prescribed exercise that exceeds an individual’s preferred level of intensity may establish a negative attitude toward physical activity. Longitudinal studies report that participants tend to deviate from physiologically based prescribed levels of intensity in favour of their apparently preferred levels. Self-regulated exercise intensity may increase enjoyment and promote adherence by allowing individuals successfully complete an activity within their perceptual preference range and without undue physiological strain. The purpose of this study is to examine the effect of self-regulated exercise intensity on endothelial function (a validated surrogate measure of early atherosclerosis) in men with coronary artery disease. Methods: Eight men with coronary artery disease (65.7 ± 4.5 yr, VO2max 18.6 ± 4.1 ml/kg/min, BMI 29.7±3.3 kg/m-2) underwent 20 min of treadmill walking at a self-regulated intensity. Endothelial dependent dilation of the brachial artery was assessed before and 1 h following the acute bout of exercise. Vessel diameter was determined using high resolution vascular ultrasonography (SonoSite, MicroMaxx) from flow mediated dilation (FMD) following 5 min of forearm occlusion. Endothelial independent vasodilation was measured at min 3, min 4 and min 5 following the administration of glyceryl trinitrate (0.4 mg). Results: The subjects self-selected an average treadmill walking speed of 5.3 km/h and a grade of 0.7%. This intensity equated to 65.7% VO2max, and an RPE-O of 12.0. Compared to baseline, FMD was significantly increased (1 min (4.6 v 10.7%) and 3 min (6.2 v 11.0) post occlusion) at 60 min following the acute bout of self regulated exercise. There was no change in endothelial independent dilation in response to the acute bout of exercise. Conclusion: These results indicate a beneficial effect of self-regulated exercise on endothelial dependent vascular function in men with coronary artery disease.
Collections Ireland -> Dublin City University -> Status = Published
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Science and Health
Ireland -> Dublin City University -> Subject = Medical Sciences: Sports sciences
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Engineering and Computing: School of Electronic Engineering
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres
Ireland -> Dublin City University -> Publication Type = Conference or Workshop Item
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools
Ireland -> Dublin City University -> Subject = Medical Sciences: Exercise
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres: CLARITY: The Centre for Sensor Web Technologies
Ireland -> Dublin City University -> Subject = Medical Sciences
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Science and Health: School of Health and Human Performance
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Engineering and Computing

Full list of authors on original publication

Niall Moyna, Michael Harrison, Antony Wekesa, Mark Ross, Ronan Murphy, Paul O'Connor, Noel McCaffrey, Kevin O'Hara, Cleona Gray, Brona Furlong and 3 others

Experts in our system

1
Niall Moyna
Dublin City University
Total Publications: 53
 
2
Michael Harrison
Waterford Institute of Technology
Total Publications: 23
 
3
Antony Wekesa
Waterford Institute of Technology
Total Publications: 6
 
4
Mark Ross
Waterford Institute of Technology
Total Publications: 6
 
5
Ronan P Murphy
Dublin City University
Total Publications: 28
 
6
Paul O'Connor
Dublin City University
Total Publications: 15
 
7
Noel McCaffrey
Dublin City University
Total Publications: 35
 
8
Bróna Furlong
Dublin City University
Total Publications: 19