A linear description of shortening induced changes in isometric length-force characteristics of rat muscle

Meijer, K. and Grootenboer, H.J. and Koopman, H.F.J.M. and Huijing, P.A. (1996) A linear description of shortening induced changes in isometric length-force characteristics of rat muscle. In: 18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 31 Oct. - 3 Nov. 1996, Amsterdam, The Netherlands.

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Abstract:	Active muscle shortening reduces the isometric force potential of muscle. This observation indicates that the isometric length-force characteristics are altered during muscle shortening. Post-shortening decrease in isometric force depends on starting length, shortening amplitude and shortening velocity. In the present study, post-shortening decrease in isometric force was determined after isokinetic contractions with various shortening amplitudes initiated from different lengths of rat medial gastrocnemius muscle. For a given target length post-shortening force decrease increased linearly with shortening amplitude. We found that the quotient of post-shortening force decrease and shortening amplitude depended linearly on muscle length. Based on our experimental results and those from other studies, we conclude that shortening induced changes in isometric length-force characteristics can be described by two simple functions. A linear function describing the influence of starting muscle length and shortening amplitude and an exponential function describing the influence of shortening velocity
Item Type:	Conference or Workshop Item
Copyright:	© 1996 IEEE
Faculty:	Engineering Technology (CTW)
Research Group:	Biomechanical Engineering (BE)
Link to this item:	http://purl.utwente.nl/publications/32994
Official URL:	http://dx.doi.org/10.1109/IEMBS.1996.651867
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