No Cover Image

Journal article 234 views 217 downloads

Effect of asthma and six-months high-intensity interval training on heart rate variability during exercise in adolescents / M. A. McNarry; M. J. Lewis; N. Wade; G. A. Davies; Con Winn; W. T. B. Eddolls; G. S. Stratton; K. A. Mackintosh; Michael Lewis; Melitta McNarry; Gareth Stratton; Kelly Mackintosh

Journal of Sports Sciences, Pages: 1 - 8

Swansea University Authors: Michael, Lewis, Melitta, McNarry, Gareth, Stratton, Kelly, Mackintosh

Abstract

Little is known regarding the influence of asthma and exercise, and their interaction, on heart rate variability (HRV) in adolescents.Thirty-one adolescents with asthma (13.7±0.9 years; 21.9±3.9 kg·m−2; 19 boys, 12 girls) and thirty-three healthy adolescents (13.8±0.9 years; 20.3±3.2 kg·m−2; 16 boys...

Full description

Published in: Journal of Sports Sciences
ISSN: 0264-0414 1466-447X
Published: 2019
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa48871
Tags: Add Tag
No Tags, Be the first to tag this record!
Abstract: Little is known regarding the influence of asthma and exercise, and their interaction, on heart rate variability (HRV) in adolescents.Thirty-one adolescents with asthma (13.7±0.9 years; 21.9±3.9 kg·m−2; 19 boys, 12 girls) and thirty-three healthy adolescents (13.8±0.9 years; 20.3±3.2 kg·m−2; 16 boys, 17 girls) completed an incremental ramp test and three heavy-intensity constant-work-rate cycle tests. Thirteen adolescents (7 boys, 6 girls; 6 asthma, 7 control) completed six-months high-intensity interval training (HIIT) and were compared to age- and sex-matched controls. Standard time-domain, frequency-domain and non-linear indices of HRV were derived at baseline, three- and six-months.Asthma did not influence HRV at baseline or following HIIT. Total power, low frequency and normalised low frequency power, and sympathovagal balance increased at three-months in HIIT, subsequently declining towards baseline at six-months. Normalised high frequency power was reduced at three-months in both groups, which was sustained at six-months. No effects of HIIT were observed in the time-domain nor in the non-linear indices.HRV was not influenced by asthma, potentially because such derangements are a function of disease progression, severity or duration. HIIT may be associated with a short-term shift towards greater sympathetic predominance during exercise, perhaps caused by physiological overload and fatigue.
Keywords: Heart rate variability (HRV), youth, exercise, non-linear, children
College: College of Engineering
Start Page: 1
End Page: 8