| Pituitary-adrenal-gonadal responses to high-intensity resistance exercise overtraining. | |
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MedLine Citation:
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PMID: 9843563 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Weight-trained men [OT; n = 11; age = 22.0 +/- 0.9 (SE) yr] resistance trained daily at 100% one-repetition maximum (1-RM) intensity for 2 wk, resulting in 1-RM strength decrements and in an overtrained state. A control group (Con; n = 6; age = 23.7 +/- 2.4 yr) trained 1 day/wk at a low relative intensity (50% 1 RM). After 2 wk, the OT group exhibited slightly increased exercise-induced testosterone (preexercise = 26.5 +/- 1.3 nmol/l, postexercise = 29.1 +/- 5.9 nmol/l) and testosterone-to-cortisol ratio (preexercise = 0. 049 +/- 0.007 nmol/l, postexercise = 0.061 +/- 0.006 nmol/l) and decreased exercise-induced cortisol (preexercise = 656.1 +/- 98.1 nmol/l, postexercise = 503.1 +/- 39.7 nmol/l). Serum concentrations for growth hormone and plasma peptide F [preproenkephalin (107-140)] were similar for both groups throughout the overtraining period. This hormonal profile is distinctly different from what has been previously reported for other types of overtraining, indicating that high-relative-intensity resistance exercise overtraining may not be successfully monitered via circulating testosterone and cortisol. Unlike overtraining conditions with endurance athletes, altered resting concentrations of pituitary, adrenal, or gonadal hormones were not evident, and exercise-induced concentrations were only modestly affected. |
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Authors:
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A C Fry; W J Kraemer; L T Ramsey |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of applied physiology (Bethesda, Md. : 1985) Volume: 85 ISSN: 8750-7587 ISO Abbreviation: J. Appl. Physiol. Publication Date: 1998 Dec |
Date Detail:
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Created Date: 1999-02-01 Completed Date: 1999-02-01 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 8502536 Medline TA: J Appl Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 2352-9 Citation Subset: IM |
Affiliation:
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Human Performance Laboratories, University of Memphis, Memphis, Tennessee 38152, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Enkephalin, Methionine / analogs & derivatives, blood Epinephrine / blood Exercise / physiology* Human Growth Hormone / blood Humans Hydrocortisone / blood Male Physical Education and Training Pituitary-Adrenal System / physiology* Protein Precursors / blood Testis / physiology* Testosterone / blood |
| Chemical | |
Reg. No./Substance:
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0/Protein Precursors; 12629-01-5/Human Growth Hormone; 50-23-7/Hydrocortisone; 51-43-4/Epinephrine; 58-22-0/Testosterone; 58569-55-4/Enkephalin, Methionine; 75718-92-2/peptide F |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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