Document Detail

Accumulated oxygen deficit measurements during and after high-intensity exercise in trained male and female adolescents.
MedLine Citation:
PMID:  9404864     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to compare accumulated oxygen deficits and markers of anaerobic metabolism [plasma ammonia (NH3) and lactate (La-) concentrations] in anaerobically trained male [n = 8, age 14.8 (0.5) years; maximal oxygen consumption VO2max 61.74 (2.23) ml x kg(-1) x min(-1)] and female [n = 8, age 14.5 (0.2) years; VO2max 49.62 (3.52) ml x kg(-1) x min(-1)] adolescents. The exercise protocol consisted of runs to exhaustion at speeds predicted to represent 120% and 130% of VO2max. Arterialised blood samples were obtained from a pre-warmed hand via a catheter inserted into a forearm vein. Samples were taken at rest and after 1, 3, 5, 7, 10, 15 and 20 min of recovery. The high-intensity exercise resulted in mean accumulated oxygen deficits that were less (P < 0.05) in females (52.3 ml x kg(-1)) than in males (68.6 ml x kg(-1)). Lower (P < 0.05) plasma concentrations of NH3 and La(-1), and a higher pH were evident in females compared with males during various stages of the 20-min recovery period. The increase in anaerobic performance in the male adolescent athletes when compared with their female counterparts was associated with an increased plasma concentration of selected plasma and blood metabolites. The observed results may reflect well-established differences between the sexes in the morphology and metabolic power of muscle.
G A Naughton; J S Carlson; D C Buttifant; S E Selig; K Meldrum; M J McKenna; R J Snow
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  European journal of applied physiology and occupational physiology     Volume:  76     ISSN:  0301-5548     ISO Abbreviation:  Eur J Appl Physiol Occup Physiol     Publication Date:  1997  
Date Detail:
Created Date:  1998-01-20     Completed Date:  1998-01-20     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0410266     Medline TA:  Eur J Appl Physiol Occup Physiol     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  525-31     Citation Subset:  IM    
Centre for Rehabilitation, Exercise and Sport Science, Department of Physical Education and Recreation, Victoria University of Technology, Melbourne, Australia.
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MeSH Terms
Ammonia / blood
Energy Metabolism*
Exercise / physiology*
Hydrogen-Ion Concentration
Lactic Acid / blood
Oxygen Consumption*
Physical Endurance
Sex Characteristics
Reg. No./Substance:
50-21-5/Lactic Acid; 7664-41-7/Ammonia

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

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