Effects of Continuous and Intermittent Stretching Exercises on Joint Contracture and Muscle Fiber in a Rat Experimental Model with Joint Immobilization Combined with Hindlimb Suspension

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Other Title
  • 持続的伸張運動と間歇的伸張運動が拘縮と筋線維におよぼす影響
  • 持続的伸張運動と間歇的伸張運動が拘縮と筋線維におよぼす影響 : 関節固定法と後肢懸垂法を組み合わせたラットの実験モデルによる検討
  • ―関節固定法と後肢懸垂法を組み合わせたラットの実験モデルによる検討―

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The objective of this study was to examine the effect of continuous and intermittent stretching exercises on joint contracture and muscle fiber in a rat experimental model characterized by joint immobilization combined with hindlimb suspension. Seventeen male Wistar rats were divided randomly into control (n=3) and experimental (n=14) groups. Bilateral ankles of each rat in the experimental group were immobilized in full plantar flexion; furthermore, hindlimbs were suspended for two weeks. Animals in the experimental group were subjected to three different exercise conditions: immobilization of the soleus muscle without stretching (I group, n=4), continuous stretching of the soleus muscle (CS group, n=6), and intermittent stretching of the soleus muscle (IS group, n=4). Ankle joint mobility in the CS and IS groups was significantly larger than that of group I; however, muscle fiber damage in the CS and IS groups was remarkable. These results suggested that both continuous and intermittent stretching inhibit the progress of joint contracture; moreover, it is possible that stretch exercises could promote necrosis of muscle fibers.

Journal

  • Physical Therapy Japan

    Physical Therapy Japan 31 (5), 304-311, 2004-08-20

    Japanese Society of Physical Therapy

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