QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Heggeness, F. W. Search for Related Content PubMed PubMed Citation Articles by Heggeness, F. W.

Resting Energy Metabolism in Intermittently Fed Weanling Rats¹

Department of Physiology, University of Rochester, School of Medicine and Dentistry, Rochester, New York

In an earlier investigation, weanling rats which were alternated between 3 days of ad libitum and 3 days of partially restricted intake ingested less food while accumulating less protein and more fat than control animals fed ad libitum. Resting oxygen consumptions were measured in weanling animals fed continuously or intermittently to ascertain whether these differences were associated with a modification of the resting metabolism. Oxygen consumption of animals fed ad libitum rose from 1.00 ± 0.02 liter/hour per kg^0.75 at weaning to a value of 1.16 ± 0.03 liter/hour per kg^0.75 after 3 weeks, then gradually declined to values present initially. Resting oxygen uptakes of animals fed intermittently remained near or below 1.00 ± 0.03 liter/hour per kg^0.75 throughout this interval. Oxygen consumption of the two groups was significantly different between days 18 and 42. Suppression of a normally occurring transient rise in resting energy expenditure in the postweaning rat appears to be a part of the metabolic response of this pattern of intermittent feeding. This also suggests that normal postweaning growth of the rat is associated with a self-limiting increase in resting metabolism.

² National Institutes of Health Career Development Awardee no. 5 KO3 HD14904-07.

Manuscript received 30 March 1968.