非肥満型2型糖尿病ラットにおける足底筋の筋線維タイプ移行に対する持久運動の予防効果 Preventive effects of endurance exercise on slow-to-fast fiber transition in plantaris muscle of non-obese type 2 diabetic rats

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Author(s)

    • 森藤 武 Morifuji Takeshi
    • 神戸大学大学院保健学研究科|大阪行岡医療大学医療学部理学療法学科 Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences|Department of Physical Therapy, Osaka Yukioka College of Health Science
    • 藤野 英己 Fujino Hidemi
    • 神戸大学大学院保健学研究科 Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences

Abstract

We investigated preventive effects of chronic endurance exercise on the slow-to-fast fiber transition in the plantaris muscles of non-obese type 2 diabetic rats. Eleven-week-old male Spontaneously Diabetic Torii Rats were used as diabetic animals, and assigned to sedentary (DB) and exercise (DB+Ex) groups. Age matched male non-diabetic Sprague-Dawley rats were used as sedentary control (Cnt) group. DB+Ex group was trained on low-intensity treadmill running for 14 weeks. Although glucose level in DB group at 25 weeks of age was higher compared to Cnt group, that in DB+Ex group was significantly lower compared to DB group. DB group exhibited lower percentages of high-oxidative type IIA fibers and higher percentages of low-oxidative type IIB fibers compared to Cnt group in the superficial layer of muscles. While DB+Ex group exhibited higher percentages of type IIA fibers and lower percentages of type IIB fibers compared to DB group in the superficial and deep layers of muscles. Additionally, succinate dehydrogenase intensity in the deep layer of muscles in DB+Ex group was increased by endurance exercise. The present study indicated that endurance exercise could prevent the slow-to-fast fiber transition of the muscle fibers and enhance mitochondrial oxidative enzyme activity in the skeletal muscles of non-obese type 2 diabetic rats.

Journal

  • Japanese Journal of Physical Fitness and Sports Medicine

    Japanese Journal of Physical Fitness and Sports Medicine 65(1), 197-203, 2016

    The Japanese Society of Physical Fitness and Sports Medicine

Codes

  • NII Article ID (NAID)
    130005120706
  • NII NACSIS-CAT ID (NCID)
    AN00137986
  • Text Lang
    ENG
  • ISSN
    0039-906X
  • NDL Article ID
    027090612
  • NDL Call No.
    Z7-301
  • Data Source
    NDL  J-STAGE 
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