Document Detail

Impressive anaerobic adaptations in elite karate athletes due to few intensive intermittent sessions added to regular karate training.
MedLine Citation:
PMID:  18694436     Owner:  NLM     Status:  MEDLINE    
The aim of this study was to investigate the effects of adding a high-intensity intermittent session twice a week during a 7-week karate training (KT) on markers of aerobic and anaerobic metabolisms in elite class karate athletes. Two groups were studied: a KT group (n=8, age 20.1+/-0.9 years, 70.0+/-8.8 kg) that followed traditional KT, and a group that followed combined traditional karate and a high-intensity intermittent training (HIT group, n=9, age 24.4+/-3.1 years, 67.0+/-7.8 kg). The subjects undertook a supramaximal exercise and a maximal oxygen uptake test before and after the training. Blood lactate, pH and plasma ammonia were determined at rest, immediately at the end of the supramaximal exercise and during the recovery period at 2, 4, 6, 8, 10 and 15 min. After the training period, no changes occurred in the KT group. However, in the HIT group, the time to exhaustion, MAOD and in the maximal oxygen uptake test were significantly improved by 23.6%, 10.3% and 4.6%, respectively. A clear-cut discrepancy was observed in the time course of lactate and pH in the supramaximal test after the training in the HIT group. We observed a significantly higher peak for lactate and a lower extreme value for pH with a shorter delay of appearance. At the end of the test, the lactate concentration increased significantly (+53.7%) and pH declined significantly, when compared with the values obtained after the same test before the training period. Ammonia was not influenced. The addition of high-intensity intermittent sessions twice per week during the period of KT induced beneficial physiological adaptations in athletes, allowing improvement in the duration of intense physical exercise before a state of fatigue is reached.
G Ravier; B Dugu??; F Grappe; J D Rouillon
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Publication Detail:
Type:  Journal Article     Date:  2008-08-05
Journal Detail:
Title:  Scandinavian journal of medicine & science in sports     Volume:  19     ISSN:  1600-0838     ISO Abbreviation:  Scand J Med Sci Sports     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2009-10-02     Completed Date:  2010-01-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9111504     Medline TA:  Scand J Med Sci Sports     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  687-94     Citation Subset:  IM    
Unit?? de formation et de recherche en sciences et techniques des activit??s physiques et sportives, Laboratoire des Sciences du Sport, Place Saint-Jacques, Besan??on cedex, France.
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MeSH Terms
Adaptation, Physiological / physiology*
Ammonia / blood
Exercise / physiology*
Hydrogen-Ion Concentration
Lactic Acid / blood
Martial Arts / physiology*
Oxygen Consumption / physiology
Physical Endurance / physiology*
Young Adult
Reg. No./Substance:
50-21-5/Lactic Acid; 7664-41-7/Ammonia

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