Document Detail

"Exercise-induced changes in redox status of elite karate athletes".
MedLine Citation:
PMID:  22242949     Owner:  NLM     Status:  In-Data-Review    
"Regular training has been claimed to increase the activity of antioxidant enzymes and, consequently, augments the resistance to oxidative stress; however, large volumes of training performed by elite sportsmen could lead to a chronic oxidative stress state. The aim of our study was to assess the oxidative status of elite athletes at the beginning of the preparatory and the beginning of the competition training phases, so that the influence of three months of programmed physical activity on redox status could be determined. The chronic effects of exercise on the redox state of the athletes were compared to the effects of a single bout of karate training. Thirty elite karate athletes, 16-30 years old, were subjected to maximal graded exercise test to estimate their aerobic capacity; blood sampling was also performed to measure levels of superoxide anion radical (O₂⁻), hydrogen peroxide (H₂O₂), superoxide dismutase activity (SOD) and catalase activity (CAT). The only significant change after the three-month training process was found in the significantly decreased CAT activity (X ± SE: 7.95 ± 0.13 U/g Hb × 10³ in the preparatory period, 6.65 ± 0.28 U/g Hb × 10³ in the competition stage; P < 0.01). After a single karate training session, there was statistically significant decrease of O₂⁻(X ± SE: 32.7 ± 4.9 nmol/ml in the preparatory period, 24.5 ± 2.5 nmol/ml in the competition stage; P < 0.05) and increase of H₂O₂(X ± SE: 11.8 ± 1.0 nmol/ml in the preparatory period, 14.2 ± 0.9 nmol/ml in the competition stage; P < 0.01), as well as significant CAT increase (X ± SE: 6.6 ± 0.6 U/g Hb × 10³ in the preparatory period, 8.5 ± 0.5 U/g Hb × 10³ in the competition stage; P < 0.05). Although the three-month training process induced, at the first sight, negative changes in the redox state, expressed through the decrease in CAT activity, adequate response of the antioxidant system of our athletes to acute exercise was preserved."
Snezana Pesic; Vladimir Jakovljevic; Dusica Djordjevic; Dejan Cubrilo; Vladimir Zivkovic; Vladimir Jorga; Vujadin Mujovic; Dragan Djuric; Biljana Stojimirovic
Related Documents :
2864249 - Submaximal predischarge exercise testing after myocardial infarction: prognostic value ...
22100179 - Intermittent versus continuous exercise training in chronic heart failure: a meta-analy...
21820959 - Physical demands of professional rugby league training and competition using microtechn...
7977059 - Utility and safety of immediate exercise testing of low-risk patients admitted to the h...
21807329 - Peripheral adaptation mechanisms in physical training and cardiac rehabilitation: the c...
22095329 - Haemophilia and exercise.
6476589 - Hemodynamics of patients with severe chronic obstructive pulmonary disease during progr...
12869359 - Benefits of supplemental oxygen in exercise training in nonhypoxemic chronic obstructiv...
23011489 - Predictors of exercise intervention dropout in sedentary individuals with type 2 diabetes.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Chinese journal of physiology     Volume:  55     ISSN:  0304-4920     ISO Abbreviation:  Chin J Physiol     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-01-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7804502     Medline TA:  Chin J Physiol     Country:  China (Republic : 1949- )    
Other Details:
Languages:  eng     Pagination:  xxx     Citation Subset:  IM    
Center for Hemodialysis, Medical Center, Obrenovac, Republic of Serbia.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

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

Previous Document:  Association of cyclooxygenase 2 single-nucleotide polymorphisms and hepatocellular carcinoma in taiw...
Next Document:  Influence of zymosan a on the content of ascorbic Acid in mice.