| Plasma protein carbonyl response to increasing exercise duration in aerobically trained men and women. | |
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MedLine Citation:
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PMID: 17024638 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The purpose of this study was to determine the effect of aerobic exercise duration on plasma protein carbonyl concentrations, a marker of protein oxidation, in aerobically trained men and women. Eight men (age: 27 +/- 4 years, VO (2peak): 4.09 +/- 0.26 L x min (-1); mean +/- SD) and 7 women (age: 27 +/- 6 years, VO (2peak): 2.33 +/- 0.24 L x min (-1)) exercised on an electrically-braked cycle ergometer at 70 % VO (2peak) for 30, 60 or 120 minutes on three separate days. Plasma samples collected before and immediately, 30- and 60-minutes post-exercise were analyzed for protein carbonyls. Mean oxygen uptake was greater for men in all conditions (2.75 +/- 0.03 L x min (-1); 38 +/- 0.43 ml x kg (-1) x min (-1)) compared to women (1.57 +/- 0.03 L x min (-1); 24.1 +/- 0.47 ml x kg (-1) x min (-1)). Total work performed during the exercise sessions was also greater for men than for women during the 30 (368 +/- 11 versus 223 +/- 7 kJ), 60 (697 +/- 17 versus 423 +/- 18 kJ), and 120-minute conditions (1173 +/- 44 versus 726 +/- 28 kJ) (Mean +/- SEM). Although these comparisons were significant (p < 0.0001), sex differences in total work performed and mean VO (2) did not result in sex differences in protein carbonyls. However, a condition by time interaction was observed with greater post-exercise values following the 120-minute condition compared to both the 30- and 60-minute conditions. Protein carbonyl concentration was greatest immediately post-exercise for both men and women and generally declined in a linear trend through one hour of recovery. These data suggest that protein carbonyl concentration is elevated by cycling exercise performed at 70 % VO (2peak), is greater following longer duration rides, begins to recover within one hour following exercise, and is not different between men and women. |
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Authors:
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R J Bloomer; P G Davis; L A Consitt; L Wideman |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2006-10-06 |
Journal Detail:
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Title: International journal of sports medicine Volume: 28 ISSN: 0172-4622 ISO Abbreviation: Int J Sports Med Publication Date: 2007 Jan |
Date Detail:
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Created Date: 2007-01-04 Completed Date: 2007-03-20 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8008349 Medline TA: Int J Sports Med Country: Germany |
Other Details:
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Languages: eng Pagination: 21-5 Citation Subset: IM |
Affiliation:
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Department of Exercise and Sport Science, University of North Carolina at Greensboro, Greensboro, NC 27402-6169, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Blood Proteins / analysis* Ergometry Exercise / physiology* Female Humans Male Oxygen Consumption / physiology Physical Endurance / physiology* Physical Fitness / physiology* Protein Carbonylation / physiology* Sex Factors Time Factors |
| Chemical | |
Reg. No./Substance:
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0/Blood Proteins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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