Key result
Adrenodemedullation in exercising rats reduced total muscle glycogen phosphorylase activity by 20% and markedly reduced plasma norepinephrine, indicating adrenomedullary hormones enhance glycogenolysis.
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May implicate adrenomedullary hormones in exercise glycogenolysis; hypothesis-generating in rats and leaves open human translation.
Richter et al. (1980) studied Exercising rats. Adrenodemedullation and/or chemical sympathectomy vs. Sham-treated controls was evaluated on Muscular and hepatic glycogenolysis, pancreatic hormonal secretion, and plasma norepinephrine. Adrenodemedullation in exercising rats reduced total muscle glycogen phosphorylase activity by 20% and markedly reduced plasma norepinephrine, indicating adrenomedullary hormones enhance glycogenolysis.
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