title: Effect of high intensity intermittent training on heart rate variability in prepubescent children.
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 (VO(2peak)) 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 VO(2peak) 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.
authors.affiliation: LEMH, Laboratory of Human Movement Studies (EA 3608), Faculty of Sport Sciences, University of Lille 2, 9, rue de l'Université, 59790, Ronchin, France. francois-xavier.gamelin-2@univ-lille2.fr
authors.forename: François-Xavier
authors.initials: FX
authors.lastname: Gamelin
authors.forename: Georges
authors.initials: G
authors.lastname: Baquet
authors.forename: Serge
authors.initials: S
authors.lastname: Berthoin
authors.forename: Delphine
authors.initials: D
authors.lastname: Thevenet
authors.forename: Cedric
authors.initials: C
authors.lastname: Nourry
authors.forename: Stéphane
authors.initials: S
authors.lastname: Nottin
authors.forename: Laurent
authors.initials: L
authors.lastname: Bosquet
mesh_terms: D001341:Autonomic Nervous System; D002648:Child; D004562:Electrocardiography; D015444:Exercise / Q000502:physiology*; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology; D010807:Physical Endurance / Q000502:physiology; D011897:Random Allocation