Document Detail

Glycogen-depletion patterns with isometric and isokinetic exercise in patients after leg injury.
MedLine Citation:
PMID:  7249554     Owner:  NLM     Status:  MEDLINE    
1. The glycogen-depletion patterns were studies as a measure of muscle-fibre recruitment in patients after leg injuries (fractures, ligament injuries). Intermittent isometric and dynamic isokinetic knee extension were performed with 30 and 50% of the maximal isometric torque of the injured leg. In a third group isokinetic and dynamic exercise with weights were compared by using maximal effort procedures. 2. The 30% maximal voluntary contraction programme, which corresponded to 16% of maximal voluntary contraction of the non-injured leg, resulted in glycogen depletion of type I fibres, which was significant only in the isometric exercise. In the 50% maximal voluntary contraction programme (41% of maximal voluntary contraction of the non-injured leg) depletion of type II fibres dominated and was significant with isometric exercises. In the maximal effort programmes there was a significant depletion of type II fibres. 3. Subjects with a relatively large reduction in strength or a small number of type I fibres demonstrated more depletion of these fibres than other subjects. 4. In patients with moderately reduced muscle strength and muscle fibre atrophy static or dynamic exercises using at least 50% of the actual maximal voluntary contraction can thus be used to recruit and train type II fibres.
B Hultén; P Renström; G Grimby
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Clinical science (London, England : 1979)     Volume:  61     ISSN:  0143-5221     ISO Abbreviation:  Clin. Sci.     Publication Date:  1981 Jul 
Date Detail:
Created Date:  1981-09-22     Completed Date:  1981-09-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7905731     Medline TA:  Clin Sci (Lond)     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  35-42     Citation Subset:  IM; S    
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MeSH Terms
Exercise Therapy
Glycogen / metabolism*
Isometric Contraction
Leg Injuries / metabolism*,  therapy
Middle Aged
Muscle Contraction
Muscles / metabolism*
Muscular Atrophy / metabolism
Reg. No./Substance:

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