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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 Orcid Logo, Gareth Stratton Orcid Logo, Kelly Mackintosh Orcid Logo

Journal of Sports Sciences, Pages: 1 - 8

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

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...

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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
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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