Document Detail


Ergometric and psychological findings during overtraining: a long-term follow-up study in endurance athletes.
MedLine Citation:
PMID:  9562220     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In the present prospective longitudinal study 17 male endurance trained athletes (cyclists and triathletes; age 23.4+/-6.7 years, VO2max 61.2+/-7.5 ml x min(-1) x kg(-1); means+/-SD) were investigated both during a state of overtraining syndrome (OT: N=15), mainly induced by an increase of exercise intensity, as well as several times in a state of regular physical ability (NS: N=62). Cycle-ergometric and psychological data were compared for a period of approximately 19 months. On 2 separate days, each subject performed a maximum incremental graded exercise, two anaerobic tests (10 s and 30 s) as well as a short-endurance "stress test" with the intensity of 110% of the individual anaerobic threshold until volitional exhaustion. The mood state was recorded by a psychological questionnaire including 40 basic items. During OT the submaximal lactate concentrations were slightly decreased. The performance of the 10 s- and 30 s-tests was unaffected. In contrast, the duration of the "stress test" decreased significantly by approximately 27% during OT compared to the individual NS. The submaximal oxygen uptake measured during the incremental graded exercise was slightly higher during OT as compared to NS, whereas the submaximal and maximal respiratory exchange ratio, maximal heart rate and maximal lactate concentrations were decreased. At the 10th minute of the "stress test", ammonia tended to be increased during OT (P=0.048). The parameters of mood state at rest as well as the subjective rating of perceived exertion during exercise were significantly impaired during OT. In conclusion, the results indicate a decreased intramuscular utilization of carbohydrates with diminished maximal anaerobic lactacid energy supply during OT. Neither the lactate-performance relationship during incremental graded exercise nor the anaerobic alactacid performance showed alterations. The duration of the short-endurance "stress test", the maximal lactate concentration of the incremental graded exercise as well as the altered mood profile turned out to be the most sensitive parameters for the diagnosis of OT.
Authors:
A Urhausen; H H Gabriel; B Weiler; W Kindermann
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of sports medicine     Volume:  19     ISSN:  0172-4622     ISO Abbreviation:  Int J Sports Med     Publication Date:  1998 Feb 
Date Detail:
Created Date:  1998-06-09     Completed Date:  1998-06-09     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8008349     Medline TA:  Int J Sports Med     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  114-20     Citation Subset:  IM; S    
Affiliation:
Institute of Sports and Preventive Medicine, University of Saarland, Saarbrücken, Germany. a.urhausen@rz.uni-sb.de
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MeSH Terms
Descriptor/Qualifier:
Adult
Affect / physiology
Ammonia / blood
Anaerobic Threshold / physiology
Bicycling / education,  physiology*,  psychology
Carbohydrate Metabolism
Ergometry
Exercise Test
Follow-Up Studies
Heart Rate / physiology
Humans
Lactates / blood
Longitudinal Studies
Male
Muscle, Skeletal / metabolism
Oxygen Consumption / physiology
Perception / physiology
Physical Endurance / physiology*
Physical Exertion / physiology
Prospective Studies
Psychomotor Performance / physiology
Pulmonary Gas Exchange / physiology
Questionnaires
Rest / physiology
Running / education,  physiology*,  psychology
Swimming / education,  physiology*,  psychology
Chemical
Reg. No./Substance:
0/Lactates; 7664-41-7/Ammonia

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