Published in:
01-03-2009 | Original Article
Effect of high intensity intermittent training on heart rate variability in prepubescent children
Authors:
François-Xavier Gamelin, Georges Baquet, Serge Berthoin, Delphine Thevenet, Cedric Nourry, Stéphane Nottin, Laurent Bosquet
Published in:
European Journal of Applied Physiology
|
Issue 5/2009
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Abstract
The purpose of this study was to observe the effect of high intermittent exercise training on children’s heart rate variability (HRV). Thirty-eight children (age 9.6 ± 1.2 years) were divided into an intermittent (IT, n = 22) and a control group (CON, n = 16). At baseline and after a 7-week training period, HRV parameters, peak oxygen consumption \( (\dot{V}{\text{O}}_{{2{\text{peak}}}} ) \) and maximal aerobic velocity (MAV) were assessed. Training consisted of three 30-min sessions composed by short maximal and supramaximal runs at velocities ranging from 100 up to 190% of MAV. HRV was computed in time and frequency domains. Training resulted in a significant increase in MAV and \( \dot{V}{\text{O}}_{{2{\text{peak}}}} \) in IT (P < 0.05) only without any significant change in HRV parameters for the two groups. Thus, 7 weeks of high intermittent exercise training allows to improve aerobic fitness. However, this modality of training was not sufficient enough to underline a possible effect on the heart rate autonomic regulation in children.