Document Detail


Ammonia threshold--comparison to lactate threshold, correlation to other physiological parameters and response to training.
MedLine Citation:
PMID:  12453163     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
During standard graded exercise, blood lactate and blood ammonia levels increase in parallel and the two thresholds appear at the same relative intensity. The first part of this study aimed at comparing ammonia threshold to lactate threshold with five different graded exercise protocols. A significant difference between the two thresholds was found only in the continuous protocol with 4-min steps in which ammonia threshold appeared at a higher intensity than lactate threshold. The second part of the study investigated the correlation of ammonia threshold to some common physiological measurements. Correlation was significant with lactate threshold, ventilation threshold and endurance time. No correlation was found the anaerobic power, anaerobic capacity measurement and peak VO2. Ammonia threshold was also studied before and after endurance training and sprint training. The 8-week endurance training program was able to delay the appearance of ammonia threshold, but not the 8-week sprint training program. Findings in this study demonstrate that ammonia threshold is a physiological parameter that should be recognized and has potential to be applied for the evaluation of exercise capacity and the effectiveness of endurance training programs.
Authors:
Y Yuan; R So; S Wong; K M Chan
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Scandinavian journal of medicine & science in sports     Volume:  12     ISSN:  0905-7188     ISO Abbreviation:  Scand J Med Sci Sports     Publication Date:  2002 Dec 
Date Detail:
Created Date:  2002-11-27     Completed Date:  2003-03-27     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9111504     Medline TA:  Scand J Med Sci Sports     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  358-64     Citation Subset:  IM    
Affiliation:
Sports Science Department, Hong Kong Sports Development Board, The Chinese University of Hong Kong, Shatin.
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MeSH Terms
Descriptor/Qualifier:
Adult
Ammonia / blood*
Case-Control Studies
Data Interpretation, Statistical
Exercise Test / methods
Humans
Lactic Acid / blood*
Oxygen Consumption
Physical Education and Training / methods*
Physical Endurance
Pulmonary Ventilation
Chemical
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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