Abstract
1. 1. Six young adult female rats were subjected to 40% body weight loss in 84 days by food restriction followed by recovery of body weight in 36.2 ± 4.28 days by ad libitum food intake. The regimen was then repeated, with 40% body weight loss in 105 days followed by recovery of body weight in 22.8 ± 2.00 days. 2. 2. Food intakes were measured continuously. 3. 3. These rats used digestible energy more efficiently during the second recovery (49.1±3.11 v. 77.3 ± 7.91 kJ digestible energy intake per g body wt gain). 4. 4. Seven rats were subjected to one body weight loss and recovery. Five of them had an efficiency of 44.1 ± 3.34 kJ/g live wt gain which was not significantly different from that of the first group during their second recovery; they may not have been capable of improvement after a second deprivation. 5. 5. It is concluded that some rats can adapt after a period of severe body weight loss and recovery to utilize food more efficiently during body weight recovery after a second episode.
Published Version
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