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|Title:||THE EFFECT OF FASTING AND REFEEDING ON OXYGEN-CONSUMPTION BY RATS|
|Authors:||Griggio, Mauro Antonio [UNIFESP]|
Luz, Jacqueline [UNIFESP]
Universidade Federal de São Paulo (UNIFESP)
THERMAL EFFECT OF FEEDING
|Publisher:||Assoc Bras Divulg Cientifica|
|Citation:||Brazilian Journal Of Medical And Biological Research. Sao Paulo: Assoc Bras Divulg Cientifica, v. 25, n. 2, p. 205-208, 1992.|
|Abstract:||Oxygen consumption is usually measured on fasted animals to avoid the thermal effect of feeding. However, fasting itself may decrease oxygen consumption as a way of conserving energy. The present study was undertaken to determine how long the fasting period should be to avoid the thermal effect of feeding without promoting a further decrease in oxygen consumption by the activation of energy-conservation mechanisms. Oxygen consumption was also measured to evaluate the effect of refeeding after different fasting periods. There was a 16% decrease in oxygen consumption from 0 to 12 h fasting related to the thermal effect of feeding, followed by a less intense (12%) decrease from 12 to 48 h fasting resulting from the energy conservation mechanism. During refeeding, oxygen consumption was higher during the first 30-min period than during the last 30-min period of the 1-h measurement, indicating the probable presence of a cephalic phase of postprandial thermogenesis. We conclude that 12-h fasting is the most appropriate period to avoid the thermal effect of feeding without significantly stimulating the energy conservation mechanism.|
|Appears in Collections:||Artigo|
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