Meal-feeding and physical effort. 2. Metabolic changes induced by an acute exercise.
In this study, rats under meal-feeding up to four weeks were submitted to a sudden exercise (swimming) to evaluate the effects of a behavior that requires mobilization of a large amount of energy on some physiological parameters already changed due to the chronic food-restriction. During exercise meal-fed rats: 1) increase the rate of gastric emptying; 2) maintain glycemia more steadily than the controls even during a long-lasting exercise; 3) maintain high liver glycogen concentration and its mobilization starts later on; 4) free fatty acid mobilization is lower than in the controls but during exercise do use much more; 5) keep more glycogen in the muscles (including the heart) than the controls but during the exercise do utilize much more; 6) are slightly less stressful (mainly after a longer exercise) than the controls as suggested by the adrenal ascorbic acid content.
Curi
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Department of Physiology and Biophysics, University of São Paulo, Brazil.
Hell
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Timo-Iaria
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D000818:Animals; D001786:Blood Glucose / Q000378:metabolism; D004734:Energy Metabolism / Q000502:physiology*; D005227:Fatty Acids / Q000378:metabolism; D005247:Feeding Behavior / Q000502:physiology*; D005746:Gastric Emptying / Q000502:physiology; D007328:Insulin / Q000097:blood; D008112:Liver Glycogen / Q000378:metabolism; D008297:Male; D009132:Muscles / Q000378:metabolism; D005082:Physical Exertion / Q000502:physiology*; D051381:Rats; D011919:Rats, Inbred Strains
D001786:Blood Glucose; D005227:Fatty Acids; D007328:Insulin; D008112:Liver Glycogen