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  • Title: Acute effect of physical exercise on glycogen content and lipoprotein lipase activity in untrained diabetic rats.
    Author: Rauramaa R.
    Journal: Med Biol; 1982 Jun; 60(3):139-43. PubMed ID: 6213824.
    Abstract:
    The effect of acute physical exercise on skeletal muscle glycogen content and on lipoprotein lipase activity of muscle, adipose and lung tissues was studied in streptozotocin diabetic and control rats. Rats were accustomed to treadmill running for two weeks after streptozotocin treatment. For an exercise bout of moderate intensity rats were randomly divided into two groups: one was sacrificed immediately after exercise and the other 24 hours afterwards. In addition there was a nonexercised sedentary group. No depletion of glycogen was observed after exercise in the vastus lateralis muscle of control (nondiabetic) rats. No difference in glycogen utilization was found in soleus muscle between diabetic and control rats. In diabetic rats a slight decrease occurred in the lipoprotein lipase activity in adipose tissue immediately after exercise, while in control rats there was a significant decline 24 hours after exercise. In soleus muscle a slight but significant increase of lipoprotein lipase activity occurred 24 hours after exercise in diabetic rats but not in control rats. The results suggest that nonketotic streptozotocin diabetes of short duration does not influence muscle glycogen in the resting state, but glycogen utilization is disturbed in white muscle during moderate treadmill running in untrained diabetic rats. The increase in lipoprotein lipase activity after physical exercise in red muscle of diabetic rats occurs during the recovery phase.
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