| Heredity and changes in hormones and metabolic rates with short-term training. | |
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MedLine Citation:
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PMID: 3521318 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The purpose of this experiment was to assess the effects of a 22-day training program on resting metabolic rate (RMR), thermic effect of a meal (TEM), and associated hormonal changes. Six pairs of male monozygotic twins were submitted to a 22-day ergocycle exercise program designed to induce a deficit in energy balance of 4.2 MJ per day. RMR and TEM after a 4.2-MJ meal challenge were measured before and after training. Results indicated that RMR and TEM did not change significantly, although a large variation in response between twin pairs was observed. Moreover, training reduced (P less than 0.05) basal and postprandial insulin response, plasma thyroid hormones triiodothyronine (T3), thyroxine (T4), and FT4 (P less than 0.05). Absolute changes in RMR and TEM exhibited significant within-pair resemblance in response, with intraclass correlations reaching r = 0.81 (P less than 0.05) and r = 0.72 (P less than 0.05), respectively. Changes in T4 and FT4 also exhibited moderate within-pair resemblance (0.42 less than or equal to r less than or equal to 0.71). These results suggest that short-term exercise training does not modify RMR and TEM but can significantly decrease plasma levels of insulin and thyroid hormones. Moreover, the similarity of response within twin pairs suggests that heredity plays a role in determining RMR, TEM, and thyroid hormone adaptation to exercise training generating a negative energy balance. |
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Authors:
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E T Poehlman; A Tremblay; A Nadeau; J Dussault; G Thériault; C Bouchard |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The American journal of physiology Volume: 250 ISSN: 0002-9513 ISO Abbreviation: Am. J. Physiol. Publication Date: 1986 Jun |
Date Detail:
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Created Date: 1986-07-23 Completed Date: 1986-07-23 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0370511 Medline TA: Am J Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: E711-7 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Basal Metabolism* Blood Glucose / metabolism Body Temperature Regulation Energy Metabolism Food Genetics* Humans Insulin / metabolism* Male Norepinephrine / blood Oxygen Consumption Physical Exertion* Thyroid Hormones / blood* Thyroxine / blood Triiodothyronine / blood Triiodothyronine, Reverse / blood Twins, Monozygotic |
| Chemical | |
Reg. No./Substance:
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0/Blood Glucose; 0/Thyroid Hormones; 11061-68-0/Insulin; 51-41-2/Norepinephrine; 5817-39-0/Triiodothyronine, Reverse; 6893-02-3/Triiodothyronine; 7488-70-2/Thyroxine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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