Linked Life Data

11513321

Source:http://linkedlifedata.com/resource/pubmed/id/11513321

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
2001-8-21
pubmed:abstractText
The slope of the expired alveolar partial pressure of carbon dioxide profile increases during exercise. Its relationship to metabolic rate, however, remains to be determined at high exercise intensities. We therefore determined the slope of alveolar partial pressures of carbon dioxide and oxygen (PACO2, PAO2, respectively) during incremental cycle ergometer exercise (an increment of 40 W each minute) to exhaustion in 11 normal subjects. The PACO2 and PAO2 increased as linear functions of carbon dioxide production and oxygen uptake (VO2), respectively, up to the estimated lactate threshold (thetaLa-). At higher intensities PACO2 increased disproportionately but PAO2 continued to increase at the same rate in 7 subjects but increased more rapidly in the remainder. The rate of change in PACO2 per unit rate of change in VO2 averaged 3.15 (SD 1.05) (mmHg.s(-1)). (l.min(-1))-1 while the rate of change in PAO2 per unit rate of change in VO2 averaged -3.53 (SD 0.79) (mmHg.s(-1)) (l.min(-1))-1 over this range. The more rapid increase in PACO2 above thetaLa- was consistent with an accelerated CO2 exchange, whereas the more rapid rate of change in PAO2 in 3 of the subjects may have reflected the development of an increased distribution of the ventilation perfusion ratio in addition to the effects of hyperventilation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
1439-6319
pubmed:author
pubmed:issnType
Print
pubmed:volume
85
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
56-61
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Effect of exercise intensity on the changes in alveolar slopes of carbon dioxide and oxygen expiratory profiles in humans.
pubmed:affiliation
Abt. Sport und Rehabilitationsmedizin, Medizinische Klinik und Poliklinik, Universitätsklinikum Ulm, Germany. juergen.steinacker@medizin.uni-ulm.de
pubmed:publicationType
Journal Article