Abstract
Summary
Cardiac glycogen mobility was compared in swimming rats that had a history of ad libitum feeding with rats placed on a restricted intake for 6 months. Swimming, nonfasted rats (fed ad libitum) demonstrated cardiac glycogenolysis in both residual and TGA fractions, whereas fasted animals in this group exhibited significant glycogenolysis in the TCA fraction of the left ventricle only. Rats with the restricted intake demonstrated no glycogenolysis in either glycogen fraction of the right or left ventricle after the swimming period. This lack of glycogenolysis did not appear to be due to somewhat limited quantities of glycogen available in the animals on restricted intake.
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