PMID: 9639347Jun 25, 1998Paper

Cyclical passive stretch influences the mechanical properties of the inactive cat soleus

Experimental Physiology
R R RoyV R Edgerton

Abstract

The effects of cyclical, passive manipulation (PM, 30 min day(-1), 5 days week(-1) for 6 months) mimicking the length excursions observed during stepping on the mechanical and associated biochemical properties of the inactive cat soleus muscle were determined in five cats. Inactivity was produced via spinal cord isolation (SI), i.e. complete spinal cord transections at low thoracic and high sacral levels and bilateral dorsal rhizotomy between the transection sites. Passive manipulation was administered to one leg of each SI cat. Compared with normal controls, SI resulted in approximately 70% decrease in weight, an 80% decrease in maximum tetanic tension (Po) and an approximately 100% increase in maximum rate of shortening (Vmax) and myosin adenosine triphosphatase (mATPase) activity of the soleus. The passive manipulation regime partially ameliorated these effects. When compared with the control SI soleus, the SI-PM soleus weight and maximum tetanic tension were 12 and 21% higher, respectively, and the Vmax and mATPase activity 21 and 12% (p > 0.05) lower, respectively. Thus, inactivity resulted in a smaller and faster muscle, whereas passive manipulation for only 30 min a day tended to maintain these properties closer to norma...Continue Reading

Citations

May 2, 2006·Progress in Neurobiology·Jonathan R Wolpaw, Jonathan S Carp
Oct 4, 2005·Clinical Biomechanics·Dario G LiebermannIan M Franks
Jan 25, 2007·Journal of Neuroengineering and Rehabilitation·Lars LünenburgerRobert Riener
Sep 5, 2002·Muscle & Nerve·Hui ZhongV Reggie Edgerton
Sep 5, 2002·Muscle & Nerve·Roland R RoyV Reggie Edgerton
Sep 5, 2002·Muscle & Nerve·Roland R RoyV R Edgerton
Dec 5, 2006·Muscle & Nerve·A S BuchmanD A Bennett
Aug 18, 2006·Cells, Tissues, Organs·Yoshinobu OhiraV Reggie Edgerton
Nov 1, 2002·American Journal of Physical Medicine & Rehabilitation·V Reggie EdgertonRyan J Monti
Apr 13, 2004·Journal of Applied Physiology·V Dietz, Susan J Harkema
Aug 10, 2006·European Journal of Applied Physiology·Menotti Midrio
Jul 29, 2003·Journal of Applied Physiology·B C HarrisonL A Leinwand
Nov 22, 2002·Advances in Physiology Education·Claire E Hulsebosch
May 21, 2011·Journal of Applied Physiology·Fabrice RannouMarie-Agnès Giroux-Metges

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