Document Detail


Muscle bioenergetics in skiers: studies using NMR spectroscopy.
MedLine Citation:
PMID:  1483757     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Sedentary human subjects (n = 6) and two homogeneous groups of athletes, trained for down-hill skiing (n = 5) and cross-country skiing (n = 7), were subjected to cardiorespiratory testing and to evaluation of the bioenergetics of calf muscles by means of Phosphorus Nuclear Magnetic Resonance Spectroscopy. The exercise consisted of successive plantar flexions performed at graded fractions of the maximal voluntary contraction force. It appears from this study that the decrease in phosphocreatine level induced by exercise at 80% of maximal voluntary contraction, was smaller in the muscles of athletes who trained for cross-country skiing, than in the muscles of down-hill skiers and control subjects. Intracellular acidosis was virtually absent in cross-country athletes. The rate of restitution of phosphocreatine, after the exercise, was higher in both groups of skiers, compared to sedentary subjects. The maximal oxygen consumption and the maximal alactic power were higher in athletes than in sedentary subjects. NMR data and mechanical measurements are used in consideration with functional systemic indexes to characterize the capabilities of skiers.
Authors:
D Laurent; H Reutenauer; J F Payen; A Favre-Juvin; J Eterradossi; J F Lebas; A Rossi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of sports medicine     Volume:  13 Suppl 1     ISSN:  0172-4622     ISO Abbreviation:  Int J Sports Med     Publication Date:  1992 Oct 
Date Detail:
Created Date:  1993-02-18     Completed Date:  1993-02-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8008349     Medline TA:  Int J Sports Med     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  S150-2     Citation Subset:  IM    
Affiliation:
Physiologie et Physiopathologie Cellulaire, Université Joseph Fourier, Grenoble.
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MeSH Terms
Descriptor/Qualifier:
Adult
Energy Metabolism / physiology*
Humans
Leg
Magnetic Resonance Spectroscopy
Muscle Contraction / physiology
Muscles / metabolism*
Oxygen Consumption / physiology
Phosphocreatine / metabolism
Phosphorus
Physical Education and Training
Skiing / physiology*
Chemical
Reg. No./Substance:
67-07-2/Phosphocreatine; 7723-14-0/Phosphorus

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


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