Document Detail


Oxidative stress and antioxidant changes during a 24-hours mountain bike endurance exercise in master athletes.
MedLine Citation:
PMID:  19188905     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIM: This work monitored changes in oxidative stress and antioxidant defence during an endurance exercise in over 40 years old athletes. METHODS: Subjects were monitored during the 24-hours mountain bike Idro Lake (North of Italy) competition which took place in June 2008. The race lasted for 24 h, starting at 10.00 a.m., ending at 10.00 a.m. of the following day and was based upon riding for as many kilometers as possible in the 24-hours time schedule in a 5.5 km circuit trail. The study included 6 men bikers, aged 44.8 +/- 2 years, who raced on an individual basis. Blood samples were collected and the oxidative stress was measured performing the d-ROMs test which determined the reactive oxygen metabolites (ROMs), whereas the antioxidant defence status was assessed determining the biological antioxidant potential (BAP test). RESULTS: The ROMs levels significantly increased after 8 h from the beginning of the competition (122 %), at the end of the race (162%), 24 h (158%) and 48 h (144%) post-race. The biological antioxidant potential significantly increased at the end of the race (128%) and remained elevated 48 h later (114%). After 72 h post-race, ROMs and BAP levels differed significantly amongst subjects, thus showing an individual response to oxidative stress. CONCLUSIONS: In conclusion, exposure to intense and prolonged exercise induced a marked increase in dROMs levels in master athletes, only partially counterbalanced by antioxidants in blood plasma. The long-term effects of oxidative agents on the human body requires further studies, but it is likely that a diet potentially rich in antioxidants would help preventing oxidative damage of body cells and tissues and enhancing recovering from the endurance performance.
Authors:
D Martarelli; P Pompei
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The Journal of sports medicine and physical fitness     Volume:  49     ISSN:  0022-4707     ISO Abbreviation:  J Sports Med Phys Fitness     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-02-03     Completed Date:  2009-07-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376337     Medline TA:  J Sports Med Phys Fitness     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  122-7     Citation Subset:  IM    
Affiliation:
Department of Experimental Medicine and Public Health, University of Camerino, Camerino, Macerata, Italy. daniele.martarelli@unicam.it
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MeSH Terms
Descriptor/Qualifier:
Adult
Antioxidants / metabolism*
Bicycling / physiology*
Circadian Rhythm / physiology*
Exercise Test
Follow-Up Studies
Free Radicals / blood
Humans
Lactic Acid / blood
Male
Middle Aged
Mountaineering / physiology*
Oxidative Stress / physiology*
Physical Endurance / physiology*
Chemical
Reg. No./Substance:
0/Antioxidants; 0/Free Radicals; 50-21-5/Lactic Acid

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


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