| Glutamate-arginine salts and hormonal responses to exercise. | |
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MedLine Citation:
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PMID: 9338087 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Hormonal changes during exercise is of growing interest because of their role in adaptation, and performance. The production of amino acids (AA) due to the degradation of muscle protein increases during exercise and some AA may be utilized for energy expenditure or as hormonal secretagogues. Thus, one can propose a strategy to reduce muscle protein breakdown and regulate hormones involved in energy metabolism by dietary AA supplementation. We assessed the effects of glutamate-arginine salt (AGs) ingestion on exercise-induced hormonal alterations in highly trained cyclists (age 18-22 yrs). Using an indwelling catheter, we collected multiple blood samples at rest, during warm up, during and after an intense exercise session. Plasma growth hormone (hGH), insulin and cortisol were measured by radioimmunoassay. As reported in previous studies, we observed a marked increase in plasma hGH and cortisol levels during and after exercise in the placebo (Pl) condition as well as a slight decrease in insulin concentration. In addition, we found that the ingestion of AGs had significant effects on some dynamic hormonal changes. AGs had no effect on resting plasma levels of hGH, insulin or cortisol. However, the marked elevation in cortisol and hGH during and after exercise in the placebo condition, was greatly diminished when subjects ingested AGs. Our results show that AGs can modify exercise-induced hormonal changes and raise the possibility that it may be used to alter energy metabolism during endurance exercise. |
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Authors:
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B Eto; G Le Moel; D Porquet; G Peres |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Archives of physiology and biochemistry Volume: 103 ISSN: 1381-3455 ISO Abbreviation: Arch. Physiol. Biochem. Publication Date: 1995 May |
Date Detail:
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Created Date: 1997-11-14 Completed Date: 1997-11-14 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 9510153 Medline TA: Arch Physiol Biochem Country: NETHERLANDS |
Other Details:
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Languages: eng Pagination: 160-4 Citation Subset: IM; S |
Affiliation:
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Laboratoire de Physiologie et Médecine du Sport, CHU Pitié-Salpétrière, Paris, France. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Arginine / pharmacology* Bicycling Energy Metabolism Exercise / physiology* Glutamic Acid / pharmacology* Human Growth Hormone / blood* Humans Hydrocortisone / blood* Insulin / blood* Kinetics Muscle Proteins / metabolism |
| Chemical | |
Reg. No./Substance:
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0/Muscle Proteins; 11061-68-0/Insulin; 12629-01-5/Human Growth Hormone; 50-23-7/Hydrocortisone; 56-86-0/Glutamic Acid; 74-79-3/Arginine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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