Effects of short duration stretching on disuse muscle atrophy in immobilized rat soleus muscles

Journal of the Japanese Physical Therapy Association = Rigaku Ryōhō
Minoru OkitaK Eguchi

Abstract

The purpose of this study was to determine whether short duration stretching is ameliorating for disuse muscle atrophy in immobilized rat soleus muscles. Eighteen male Wistar rats (age, 8 weeks; weight, 311.0 ± 35.6 g) were divided randomly into control (n=3) and experimental (n=15) groups. Bilateral ankles of each rat in the experimental group were fixed in full planter flexion with a plaster cast. After the experimental groups rats were immobilized for 4 weeks, animals were divided into three groups: immobilization alone (group I, n=3), stretch training for 30 min/day for 1 or 3 weeks after remobilization (group S, n=6), and spontaneous recovery (non stretch training) for 1 or 3 weeks after remobilization (group NS, n=6). At the end of the experimental periods, the soleus muscle was extracted from hindlimb, and the frozen sections were stained with myofibrillar adenosine triphosphatase. After 1 week of remobilization, the means of the muscle fiber diameters for type I fibers in group S had increased significantly compared with group NS, but those for type II fibers in group S did not significantly differ from that for group NS. After 3 weeks of remobilization, the means of the muscle fiber diameters for types I and II fibers ...Continue Reading

Citations

Dec 7, 2013·Acta histochemica·Priscila Cação Oliveira Benedini-EliasAna Claudia Mattiello-Sverzut
Mar 3, 2007·Journal of Anatomy·Anna R S GomesAna Cláudia Mattiello-Sverzut
Aug 16, 2013·Scandinavian Journal of Medicine & Science in Sports·R Akagi, H Takahashi
Apr 5, 2018·Frontiers in Physiology·Yunfang GaoNandu Goswami

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