Document Detail


Consumption of green tea favorably affects oxidative stress markers in weight-trained men.
MedLine Citation:
PMID:  18337059     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: This study investigated the effects of the consumption of green tea (GT) for 7 d on biomarkers of oxidative stress in young men undergoing resistance exercise. METHODS: Fourteen subjects performed a bench press exercise (four sets, 10 to 4 repetitions) after undergoing a period without (control group) or with the intake of GT (GT group; 2 g of leaves in 200 mL of water, three times per day). Blood samples were obtained before and after exercise and analyzed for total antioxidant capacity (ferric reducing ability of plasma [FRAP]), total polyphenols, reduced glutathione (GSH), lipid hydroperoxide (LH) and thiobarbituric acid-reactive substances, creatine kinase (CK), aspartate aminotransferase (AST), xanthine oxidase (XO), hypoxanthine, and uric acid (UA). RESULTS: In the control group, exercise did not affect the values of LH, thiobarbituric acid-reactive substances, and FRAP, although it did reduce the levels of GSH (P < 0.05). In addition, exercise increased CK, AST, and XO activities, although it did not change the values for hypoxanthine or UA. Green tea reduced the postexercise concentration of LH and increased the values of total polyphenols, GSH, and FRAP. GT also inhibited a significant rise in CK and XO activities induced by exercise. Furthermore, GT decreased the AST activity and hypoxanthine and UA concentrations before and after exercise. The assessment of food consumption revealed that the participants had an unbalanced diet, particularly in relation to vitamin E and carotenoids. CONCLUSION: Consumption of GT, a beverage rich in polyphenols, may offer protection against the oxidative damage caused by exercise, and dietary guidance for sports participants should be emphasized.
Authors:
Vilma Simões Pereira Panza; Elisabeth Wazlawik; Gustavo Ricardo Schütz; Leandro Comin; Karl Christian Hecht; Edson Luiz da Silva
Related Documents :
22545069 - Promoting exercise in parkinson's disease through community-based participatory research.
17114239 - Exercise-induced brachial artery vasodilation: role of free radicals.
25488399 - An update of stabilisation exercises for low back pain: a systematic review with meta-a...
12957629 - 'in vitro' antioxidant and photoprotective properties and interaction with model membra...
20308979 - Effect of different exercise intensities on oxidative stress markers and antioxidant re...
17502999 - Immunological memory of mountain birches: effects of phenolics on performance of the au...
12177659 - Effectiveness of a novel serotonin blocker, sarpogrelate, for patients with angina pect...
17685699 - Game analysis and energy requirements of elite squash.
9402459 - Catecholamines contribute to exertional dyspnoea and to the ventilatory response to exe...
Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't     Date:  2008-03-12
Journal Detail:
Title:  Nutrition (Burbank, Los Angeles County, Calif.)     Volume:  24     ISSN:  0899-9007     ISO Abbreviation:  Nutrition     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-04-11     Completed Date:  2008-08-11     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8802712     Medline TA:  Nutrition     Country:  United States    
Other Details:
Languages:  eng     Pagination:  433-42     Citation Subset:  IM    
Affiliation:
Department of Nutrition, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil. giovil@terra.com.br
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Antioxidants / analysis,  pharmacology*
Aspartate Aminotransferases / metabolism
Beverages
Biological Markers / analysis,  metabolism
Creatine Kinase / metabolism
Cross-Over Studies
Exercise / physiology
Flavonoids / analysis,  pharmacology*
Glutathione / metabolism
Humans
Hypoxanthine / metabolism
L-Lactate Dehydrogenase / metabolism
Lipid Peroxidation / drug effects*
Male
Oxidation-Reduction
Oxidative Stress
Oxygen Consumption
Phenols / analysis,  pharmacology*
Tea* / chemistry
Thiobarbituric Acid Reactive Substances / metabolism
Uric Acid / metabolism
Weight Lifting / physiology*
Xanthine Oxidase / metabolism
Chemical
Reg. No./Substance:
0/Antioxidants; 0/Biological Markers; 0/Flavonoids; 0/Phenols; 0/Tea; 0/Thiobarbituric Acid Reactive Substances; 0/polyphenols; 68-94-0/Hypoxanthine; 69-93-2/Uric Acid; 70-18-8/Glutathione; EC 1.1.1.27/L-Lactate Dehydrogenase; EC 1.17.3.2/Xanthine Oxidase; EC 2.6.1.1/Aspartate Aminotransferases; EC 2.7.3.2/Creatine Kinase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  The PTSD symptom scale's latent structure: an examination of trauma-exposed medical patients.
Next Document:  Iodine deficiency in pregnant women residing in an area with adequate iodine intake.