Document Detail

In vivo measurement of the series elasticity release curve of human triceps surae muscle.
MedLine Citation:
PMID:  9802779     Owner:  NLM     Status:  MEDLINE    
The force-extension characteristic of the series-elastic component of the human triceps surae muscle has been measured in vivo by means of a hydraulic controlled-release ergometer in 12 subjects. The SEC characteristic can be described by a linear relation between muscle moment and extension, with a stiffness K1, preceded by a quadratic 'toe' region at low moments. Stiffness K1 increases with the level of activation of the muscle. At an ankle moment of 100 N m, values range between 250 and 400 N m rad(-1). The elastic stretch corresponds then to about 30, which is considerable compared with the total ankle movement range. At moments of 150 and 180 N m, which correspond to the peak moments in walking and running, respectively, the elastic energy stored in the SEC was 23-37 and 31-57 J. These energy values are amply sufficient to enable the conservation of negative (eccentric) work into a subsequent phase of positive (concentric) work in both walking and running.
A L Hof
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of biomechanics     Volume:  31     ISSN:  0021-9290     ISO Abbreviation:  J Biomech     Publication Date:  1998 Sep 
Date Detail:
Created Date:  1999-01-29     Completed Date:  1999-01-29     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  793-800     Citation Subset:  IM    
Department of Medical Physiology, University of Groningen, The Netherlands.
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MeSH Terms
Ankle Joint / physiology
Leg / physiology*
Middle Aged
Models, Biological
Muscle, Skeletal / physiology*
Range of Motion, Articular
Running / physiology
Walking / physiology

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