Linked Life Data

3699692

Source:http://linkedlifedata.com/resource/pubmed/id/3699692

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1986-6-9
pubmed:abstractText
Blood prolactin (PRL) variations have been linked to temperature and osmotic changes in several species. The latter factors are here explored to better understand blood PRL responses frequently induced during physical exercise. Since body heat generated by exercise can lead to marked body fluid shifts, it was postulated that PRL changes observed during exercise could be associated with variations in body temperature and/or blood osmolality (OSM). A wide range (38.5-40.5 degrees C) of rectal temperatures (Tr; used here to appreciate core temperatures) were theoretically selected and randomly assigned as targets to male runners. Measured by thermistor probe, target Tr were obtained by a combination of factors: (a) increases heat production by treadmill running, and (b) decreases heat losses by appropriate clothing (decreases evaporation) in warmed (decreases radiation) and hypoventilated (decreases convection) laboratory conditions. For each subject, target Tr was attained not prior to 30 min after initiation of running, and had to be maintained for at least 10 min, for a mean (+/- SD) running time of 52.6 +/- 10.0 min. In a first protocol, hypohydration was provoked in 26 runners (23.9 +/- 4.7 years) by total restriction of water intake. In a second protocol (10 different runners: 22.3 +/- 3.3 years), euhydration was maintained by water intake (20 ml/kg body weight). Venous blood was sampled at rest before and immediately after the run. PRL was assayed by RIA; OSM was measured by freezing point depression; sodium was analyzed by flame photometry. At rest, before the heat-producing exercise, mean PRL values were 9.4 +/- 3.4 ng/ml for both eu/hypohydrated groups.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0301-0163
pubmed:author
pubmed:issnType
Print
pubmed:volume
23
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
200-6
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1986
pubmed:articleTitle
Exercise-induced blood prolactin variations in trained adult males: a thermic stress more than an osmotic stress.
pubmed:publicationType
Journal Article, Clinical Trial, Randomized Controlled Trial