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Physiological and perceptual responses during self-regulated exercise in men with coronary artery disease

O'Hara, Kevin and Hughes, Sarah and McGuinness, Kevin and O'Connor, Noel E. and Furlong, Brona and Gray , Cleona and McCaffrey, Noel and O'Connor, Paul and Murphy, Ronan and Ross, Mark and Wekesa, Antony and Harrison, Michael and Moyna, Niall (2011) Physiological and perceptual responses during self-regulated exercise in men with coronary artery disease. In: ACSM's 58th Annual Meeting, May 31 - June 04, Denver, Colorado.

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Abstract

Purpose: 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. This study examined the physiological and perceptual responses during self-regulated exercise in men with CAD. Methods: Eight men with CAD (65.7 ± 4.5 yr, VO2max 18.6 ± 4.1 ml/kg/min, BMI 29.7±3.3 kg/m-2) exercised on a treadmill for 20 min at a self regulated intensity. They were allowed to change the velocity and grade every 5 min. Respiratory metabolic and gas exchange variables were measured continuously using open circuit spirometry. Heart rate was continuously recorded using telemetry, and undifferentiated RPE (RPE-O) was recorded every 5 min using the Borg 15-category scale. Results: Perceptual and physiological responses remained stable after the first 5 min of exercise. Subjects exercised at 65.7 ± 14.2 % VO2max and 94 ± 5.0 % HRpeak during the final 15 min of self regulated exercise. This equates to a treadmill velocity of 5.3 ± 0.9 km/h, and a grade of 0.7 ± 1.1. The RPE-O was 12.0 ± 2.0, and falls between the verbal descriptors of fairly light and somewhat hard. Conclusion: When allowed to self-regulate their exercise intensity, men with CAD select an intensity that is perceived to be fairly light to somewhat hard, and elicits a physiological response likely to improve cardiovascular health.

Item Type:Conference or Workshop Item (Poster)
Event Type:Conference
Refereed:Yes
Uncontrolled Keywords:coronary artey disease; CAD
Subjects:Medical Sciences > Exercise
Medical Sciences > Performance
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Engineering and Computing > School of Electronic Engineering
DCU Faculties and Schools > Faculty of Science and Health > School of Health and Human Performance
Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
Official URL:http://acsmannualmeeting.org/
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Science Foundation Ireland
ID Code:16321
Deposited On:19 Jul 2011 14:05 by Noel O'Connor. Last Modified 19 Jul 2011 14:05

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