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The Force-Length Curves of the Human Rectus Femoris and Gastrocnemius Muscles in Vivo

Winter, Samantha L., Challis, John H. (2010) The Force-Length Curves of the Human Rectus Femoris and Gastrocnemius Muscles in Vivo. Journal of Applied Biomechanics, 26 (1). pp. 45-51. ISSN 1065-8483. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://hdl.handle.net/2160/8449

Abstract

For a physiologically realistic joint range of motion and therefore range of muscle fiber lengths, only part of the whole muscle force-length curve can be used in vivo; that is, only a section of the force-length curve is expressed. Previous work has determined that the expressed section of the force-length curve for individual muscles can vary between subjects; however, the degree of intersubject variability is different for different muscles. This study determined the expressed section of both the rectus femoris and gastrocnemius—muscles with very different ratios of tendon slack length to muscle fiber optimum length—for 28 nonspecifically trained subjects to test the hypothesis that the value of this ratio affects the amount of variability in the expressed section. The force-length curves of the two muscles were reconstructed from moment-angle data using the method of Herzog & ter Keurs (1988). There was no relationship between the expressed sections of the force-length curve for the two muscles. Less variability was found in the expressed section of the gastrocnemius compared with the rectus femoris, supporting the hypothesis. The lack of relationship between the expressed sections of the two muscles has implications for motor control and for training muscle for rehabilitation.

Item Type: Article
Additional information: number of additional authors: 1;
Subjects: Q Science > QP Physiology (Living systems)
Divisions: Faculties > Sciences > School of Sport and Exercise Sciences
Depositing User: Samantha Winter
Date Deposited: 07 Mar 2014 00:05 UTC
Last Modified: 29 May 2019 12:23 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/40370 (The current URI for this page, for reference purposes)
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