| Racial differences in postprandial oxidative stress with and without acute exercise. | |
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MedLine Citation:
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PMID: 19910649 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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High-kilocalorie feedings induce oxidative stress. Acute exercise has the potential to attenuate postprandial oxidative stress. No study has determined whether there are racial differences in postprandial oxidative stress with and without a preceding bout of acute exercise. PURPOSE: To investigate the impact of acute exercise on blood oxidative-stress biomarkers, triglycerides (TAG), and glucose in African American (AA) and White (W) women. METHODS: 10 AA (age 29 +/- 3 yr, body-mass index [BMI] 31 +/- 3 kg/m(2)) and 10 W (age 30 +/- 2 yr, BMI 30 +/- 3 kg/m(2)) women consumed a meal of 1.2 g of fat and carbohydrate and 0.25 g of protein per kilogram body mass, on 2 occasions-with and without a session of aerobic exercise 15 min preceding the meal (45 min cycling at 65% heart-rate reserve)--in a random-order crossover design. Blood samples were collected premeal (fasted), and at 1, 2, 4, and 6 hr postmeal and assayed for TAG, glucose, xanthine oxidase activity, hydrogen peroxide (H2O2), and malondialdehyde (MDA). Area under the curve (AUC) was calculated for each variable. RESULTS: AUC was lower for AA compared with W for both the exercise and the no exercise conditions for H2O2, MDA, and TAG (p < .01). However, acute exercise had no effect on decreasing the AUC for any variable in either AA or W women (p > .05). CONCLUSIONS: Postprandial lipemia and oxidative stress are lower in AA than in W overweight/obese women. However, acute exercise, performed at the intensity and duration in the current study, does not influence postprandial lipemia or oxidative stress in AA or W women. |
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Authors:
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Richard J Bloomer; Bradford Cole; Kelsey H Fisher-Wellman |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: International journal of sport nutrition and exercise metabolism Volume: 19 ISSN: 1526-484X ISO Abbreviation: Int J Sport Nutr Exerc Metab Publication Date: 2009 Oct |
Date Detail:
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Created Date: 2009-11-13 Completed Date: 2010-01-29 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100939812 Medline TA: Int J Sport Nutr Exerc Metab Country: United States |
Other Details:
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Languages: eng Pagination: 457-72 Citation Subset: IM |
Affiliation:
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Cardiorespiratory/Metabolic Laboratory, University of Memphis, Memphis, TN 38152, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult African Americans* Area Under Curve Biological Markers / blood Blood Glucose / metabolism Cross-Over Studies Dietary Fats / administration & dosage, metabolism European Continental Ancestry Group* Exercise / physiology* Fasting / physiology Female Humans Lipid Peroxidation Obesity / blood, metabolism Overweight / blood, metabolism Oxidative Stress / physiology* Postprandial Period / physiology* Triglycerides / blood |
| Chemical | |
Reg. No./Substance:
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0/Biological Markers; 0/Blood Glucose; 0/Dietary Fats; 0/Triglycerides |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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