Document Detail


Ventilatory variables in normal children during rest and exercise.
MedLine Citation:
PMID:  11292109     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The aim of this study was to provide a complete description of normal ventilation at rest and exercise in children and to determine how best to correct for body size. One-hundred and six children aged 8-17 years (55 male) underwent incremental bicycle exercise testing from rest to exhaustion in 3 min, 15 W.m(-2) steps and thence through 9 min recovery. All variables were calculated using helium dilution mixed expired gas analysis together with measures of alveolar gas concentrations from continuous measurement at the mouth, all via an AMIS 2000 quadrupole mass spectrometer. Surface area was the best single measure to correct for body size but always explained <37% of the variance. Thus for example, surface area corrected oxygen consumption at rest in males was greater than females. Data is presented at rest, each work load and at "maximum" exercise. When presented per watt of work at each work load, this permits comparison of adaptability to exercise between sexes and age groups. Exercise appears to terminate when respiration reaches 45 and 40 breaths-min(-1) in males and females respectively and when alveolar oxygen concentrations rise. This simple protocol and near complete data set ought to permit accurate comparison with disease groups.
Authors:
M Rosenthal; A Bush
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The European respiratory journal     Volume:  16     ISSN:  0903-1936     ISO Abbreviation:  Eur. Respir. J.     Publication Date:  2000 Dec 
Date Detail:
Created Date:  2001-04-06     Completed Date:  2001-07-05     Revised Date:  2013-05-23    
Medline Journal Info:
Nlm Unique ID:  8803460     Medline TA:  Eur Respir J     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  1075-83     Citation Subset:  IM    
Affiliation:
Dept of Paediatric Respiratory Medicine, The Royal Brompton Hospital, London, UK.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Age Factors
Carbon Dioxide / physiology
Child
Exercise / physiology*
Exercise Test
Female
Humans
Male
Oxygen / physiology
Pulmonary Gas Exchange / physiology*
Reference Values
Rest*
Chemical
Reg. No./Substance:
124-38-9/Carbon Dioxide; 7782-44-7/Oxygen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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