title: High-intensity intermittent running training improves pulmonary function and alters exercise breathing pattern in children.
abstract: We investigated the effects of short duration running training on resting and exercise lung function in healthy prepubescent children. One trained group (TrG) (n = 9; three girls and six boys; age = 9.7 +/- 0.9 year) participated in 8 weeks of high-intensity intermittent running training and was compared to a control group (ContG) (n = 9; four girls and five boys; age = 10.3 +/- 0.7 year). Before and after the 8-week period, the children performed pulmonary function tests and an incremental exercise test on a cycle ergometer. After the 8-week period, no change was found in pulmonary function in ContG. Conversely, an increase in forced vital capacity (FVC) (+7 +/- 4% ; P = 0.026), forced expiratory volume in one second (+11 +/- 6% ; P = 0.025), peak expiratory flows (+17 +/- 4% ; P = 0.005), maximal expiratory flows at 50% (+16 +/- 10% ; P = 0.019) and 75% (+15 +/- 8% ; P = 0.006) of FVC were reported in TrG. At peak exercise, TrG displayed higher values of peak oxygen consumption (+15 +/- 4% ; P < 0.001), minute ventilation (+16 +/- 5% ; P = 0.033) and tidal volume (+15 +/- 5% ; P = 0.019) after training. At sub-maximal exercise, ventilatory response to exercise DeltaV(E)/DeltaV(CO(2)) was lower (P = 0.017) in TrG after training, associated with reduced end-tidal partial oxygen pressure (P < 0.05) and higher end-tidal partial carbon dioxide pressure (P = 0.026). Lower deadspace volume relative to tidal volume was found at each stage of exercise in TrG after training (P < 0.05). Eight weeks of high-intensity intermittent running training enhanced resting pulmonary function and led to deeper exercise ventilation reflecting a better effectiveness in prepubescent children.
authors.affiliation: Multidisciplinary Analysis Laboratory of Sport Practices, Artois University, Chemin du Marquage, Liévin, France.
authors.forename: Cédric
authors.initials: C
authors.lastname: Nourry
authors.forename: Fabien
authors.initials: F
authors.lastname: Deruelle
authors.forename: Comlavi
authors.initials: C
authors.lastname: Guinhouya
authors.forename: Georges
authors.initials: G
authors.lastname: Baquet
authors.forename: Claudine
authors.initials: C
authors.lastname: Fabre
authors.forename: Fédéric
authors.initials: F
authors.lastname: Bart
authors.forename: Serge
authors.initials: S
authors.lastname: Berthoin
authors.forename: Patrick
authors.initials: P
authors.lastname: Mucci
mesh_terms: D002648:Child; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D010806:Physical Education and Training; D012123:Pulmonary Ventilation / Q000502:physiology*; D012119:Respiration; D012420:Running / Q000502:physiology*; D013997:Time Factors