Linked Life Data

4077801

Source:http://linkedlifedata.com/resource/pubmed/id/4077801

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1986-1-29
pubmed:abstractText
The pattern of arterial lactate concentration ([La-]) increase during incremental exercise was studied using a transformation defined by plotting log([La-]) vs. log(VO2), where VO2 is O2 uptake. A plot of this function exhibits a phase of very slow increase followed by a phase of rapid increase, defining a transition in the underlying relationship between [La-] and VO2. These phases were found to be linear on the log-log plot; linear regression analysis may therefore be used to locate the transition between them (lactate threshold). A transition point was found at a lower VO2 on the semilog plot of log([La-]) vs. VO2. Consideration of the data from all studies led to the conclusion that a more accurate result is provided by the log-log transformation. This analysis shows lactate to have a small, but significant, increase before the transition and to increase beyond it with a power law having an exponent of about 2.9. This result shows that, during incrementally increasing work rate tests, arterial lactate exhibits a threshold behavior, i.e., an abrupt transition from a phase of slow increase to a phase of rapidly accelerating increase.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
8750-7587
pubmed:author
pubmed:issnType
Print
pubmed:volume
59
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1936-40
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Improved detection of lactate threshold during exercise using a log-log transformation.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.