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Physiological and perceptual responses during self-regulated exercise in children with cystic fibrosis

Britton, Fionnuala (2011) Physiological and perceptual responses during self-regulated exercise in children with cystic fibrosis. Master of Science thesis, Dublin City University.

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Abstract

Purpose: To examine the physiological and perceptual responses during self-regulated exercise in children with cystic fibrosis (CF). Methods: Twelve children (10.8 ± 2.0 y) with CF made 3 separate visits to the research laboratory in the school of Health and Human Performance in DCU. The first visit was used to determine VO2peak and to anchor the children’s OMNI RPE scale. The second visit was used to familiarise the children with the testing procedures. During the final visit children exercised for 20 min on a cycle ergometer. The exercise intensity was self-regulated. Heart rate (HR) and VO2 were measured using telemetry and open circuit spirometry, respectively. Undifferentiated RPE (RPE-O) and differentiated RPE for the chest (RPC-C) and legs (RPE-L) were assessed using the Children’s OMNI RPE scale. Results: Perceptual and physiological responses remained stable after the first 5 min of exercise. Subjects exercised at 53% VO2peak and 73% HRpeak during the final 15 min of self-regulated exercise. RPE-O was 5.8 ± 2.6, RPE-C was 4.5 ± 2.6, and RPE L was 5.7 ± 2.4. The %VO2peak and %HRpeak corresponding to the ventilatory breakpoint (Vpt) was 63% and 82% respectively. Two thirds of the subjects selected an exercise intensity ±20% VO2@Vpt, and one third selected an intensity 31 - 38% below VO2@Vpt. Conclusion: Although the mean %VO2peak was within the moderate to vigorous intensity range recommended for health and fitness benefits, there were large intra individual variations in RPE, %VO2peak, %HRpeak and %Vpt during self regulated exercise in children with CF.

Item Type:Thesis (Master of Science)
Date of Award:November 2011
Refereed:No
Supervisor(s):Moyna, Niall
Uncontrolled Keywords:OMNI RPE scale; VO2 peak
Subjects:Biological Sciences > Biology
Medical Sciences > Exercise
Medical Sciences > Performance
Medical Sciences > Health
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Health and Human Performance
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 3.0 License. View License
ID Code:16633
Deposited On:30 Nov 2011 15:46 by Niall Moyna. Last Modified 30 Nov 2011 15:46

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