Weight loss associated with exercise training restores ventilatory efficiency in obese children
Deutscher übersetzter Titel: | Gewichtsverlust in Verbindung mit köperlichem Training stärkt den ventilatorischen Wirkungsgrad bei adipösen Kindern |
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Autor: | Prado, D.M.; Silva, A.G.; Trombetta, I.C.; Ribeiro, M.M.; Nicolau, C.M.; Guazzelli, I.C.; Matos, L.N.; Negrão, C.E.; Villares, S.M. |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 30 (2009), 11, S. 821-826, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-0029-1233486 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU200912008114 |
Quelle: | BISp |
Abstract
The purpose of this study was to test the hypothesis that in obese children: 1) Ventilatory efficiency (VentE) is decreased during graded exercise; and 2) Weight loss through diet alone (D) improves VentE, and 3) diet associated with exercise training (DET) leads to greater improvement in VentE than by D. Thirty-eight obese children (10±0.2 years; BMI >95th percentile) were randomly divided into two study groups: D (n=17; BMI=30±1 kg/m2) and DET (n=21; 28±1 kg/m2). Ten lean children were included in a control group (10±0.3 years; 17±0.5 kg/m2). All children performed maximal treadmill testing with respiratory gas analysis (breath-by-breath) to determine the ventilatory anaerobic threshold (VAT) and peak oxygen consumption (VO2 peak). VentE was determined by the VE/VCO2 method at VAT. Obese children showed lower VO2 peak and lower VentE than controls (p<0.05). After interventions, all obese children reduced body weight (p<0.05). D group did not improve in terms of VO2 peak or VentE (p>0.05). In contrast, the DET group showed increased VO2 peak (p=0.01) and improved VentE (ΔVE/VCO2=−6.1±0.9; p=0.01). VentE is decreased in obese children, where weight loss by means of DET, but not D alone, improves VentE and cardiorespiratory fitness during graded exercise. Verf.-Referat