| Influence of low muscle temperature on muscle metabolism during intense dynamic exercise. | |
| | |
MedLine Citation:
|
PMID: 6711338 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Eight males performed intense leg cycle exercise at a constant rate of work averaging 350 W, according to three different protocols: 1) "Cold exhaustive" exercise (initial muscle temperature (Tm) = 29 degrees C), 2) "Warm non-exhaustive" exercise (initial Tm = 34 degrees C) for the same period of time as in 1), and 3) "Warm exhaustive" (initial Tm = 34 degrees C). In five subjects the concentration of various muscle metabolites was determined before and immediately, 1 min, and 5 min after exercise. Blood lactate concentration was determined before and repeatedly after exercise. At low Tm maximal work time was considerably shorter for all subjects compared to normal Tm, 1.3 and 2.1 min, respectively. Comparing conditions 1) and 2) oxygen deficit and the decrease in ATP and CP content were the same in the two experiments. There was a significantly higher concentration of glucose-6-phosphate 17.6 +/- 10.1 and 8.0 +/- 6.2 mmol X kg dw-1, respectively, and a tendency to higher lactate concentration 60 +/- 36 and 33 +/- 14 mmol X kg dw-1, respectively, immediately after exercise in the "cold exhaustive exercise". Peak blood lactate concentration appeared significantly later after "cold exhaustive" exercise indicating a slower elimination rate of lactate from the muscle compared to "warm non-exhaustive" exercise. The reduction in performance observed at low Tm may partially be explained by an increased accumulation rate of lactate in four of five subjects. |
| | |
Authors:
|
E Blomstrand; U Bergh; B Essén-Gustavsson; B Ekblom |
Related Documents
:
|
16376018 - No-mediated alterations in skeletal muscle nutritive blood flow and lactate metabolism ... 2800678 - Lactate and pyruvate kinetics after treadmill exercise in patients with intermittent cl... 2403868 - Gas exchange theory and the lactic acidosis (anaerobic) threshold. 15563708 - Individualised unsupervised exercise training in adults with cystic fibrosis: a 1 year ... 18996048 - Dyspnoea versus fatigue: additional prognostic information from symptoms in chronic hea... 3086328 - Substrate utilization for lactate and energy production by heat-shocked l929 cells. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Acta physiologica Scandinavica Volume: 120 ISSN: 0001-6772 ISO Abbreviation: Acta Physiol. Scand. Publication Date: 1984 Feb |
Date Detail:
|
Created Date: 1984-05-02 Completed Date: 1984-05-02 Revised Date: 2008-11-21 |
Medline Journal Info:
|
Nlm Unique ID: 0370362 Medline TA: Acta Physiol Scand Country: SWEDEN |
Other Details:
|
Languages: eng Pagination: 229-36 Citation Subset: IM; S |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adolescent Adult Body Temperature* Energy Metabolism* Fructosediphosphates / metabolism Glucose-6-Phosphate Glucosephosphates / metabolism Glycolysis Heart Rate Humans Lactates / blood Male Muscles / metabolism* Oxygen Consumption Physical Exertion* |
| Chemical | |
Reg. No./Substance:
|
0/Fructosediphosphates; 0/Glucosephosphates; 0/Lactates; 488-69-7/fructose-1,6-diphosphate; 56-73-5/Glucose-6-Phosphate |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The reno-renal reflex; evaluation from renal blood flow measurements.
Next Document: On a cholinergic motor innervation of the rat urethra.