Document Detail


Ventilatory responses to exercise training in obese adolescents.
MedLine Citation:
PMID:  22884972     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The aim of this study was to examine ventilatory responses to training in obese adolescents. We assessed body composition, pulmonary function and ventilatory responses (among which expiratory flow limitation and operational lung volumes) during progressive cycling exercise in 16 obese adolescents (OB) before and after 12 weeks of exercise training and in 16 normal-weight volunteers. As expected, obese adolescents' resting expiratory reserve volume was lower and inversely correlated with thoraco-abdominal fat mass (r=-0.74, P<0.0001). OB presented lower End Expiratory (EELV) and End Inspiratory Lung Volumes (EILV) at rest and during submaximal exercise, and modest expiratory flow limitation. After training, OB increased maximal aerobic performance (+19%) and maximal inspiratory pressure (93.7±31.4 vs 81.9±28.2cm H(2)O, +14%) despite lack of decrease in trunk fat and body weight. Furthermore, EELV and EILV were greater during submaximal exercise (+11% and +9% in EELV and EILV, respectively), expiratory flow limitation delayed but was not accompanied by increased Vt. However, submaximal exertional symptoms (dyspnea and leg discomfort) were significantly decreased (-71.3% and -70.7%, respectively). Our results suggest that exercise training can improve pulmonary function at rest (static inspiratory muscle strength) and exercise (greater operating lung volumes and delayed expiratory flow limitation) but these modifications did not entirely account for improved dyspnea and exercise performance in obese adolescents.
Authors:
Monique Mendelson; Anne-Sophie Michallet; François Estève; Claudine Perrin; Patrick Levy; Bernard Wuyam; Patrice Flore
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-7
Journal Detail:
Title:  Respiratory physiology & neurobiology     Volume:  -     ISSN:  1878-1519     ISO Abbreviation:  Respir Physiol Neurobiol     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101140022     Medline TA:  Respir Physiol Neurobiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier B.V.
Affiliation:
Joseph Fourier University, Hypoxia Physiopathology Laboratory, Grenoble, F-38000, France;; Inserm U1042, Grenoble, F-38000, France;; Grenoble University Hospital, Sports Medicine Unit, University Clinic of Physiology, Sleep and Exercise, Rehabilitation and Physiology Department, South Hospital, Grenoble, F-38000, France;
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