PMID: 3772527Oct 1, 1986Paper

Energy utilization in food-restricted female rats

The Journal of Nutrition
J O HillM Digirolamo

Abstract

We studied changes in energy utilization in mature female rats exposed to varying degrees of food restriction. Food-restricted rats showed considerable energy conservation, exhibited primarily as a reduction in the energy required for daily maintenance. When a given body weight loss was produced by starvation (3 or 6 d), changes in body composition and energy utilization differed only slightly (and temporarily) compared with the same body weight lost by partial food restriction. All food-restricted groups demonstrated a remarkable ability to reduce maintenance energy costs and to achieve zero energy balance at food intakes 40-50% of controls. By contrasting these results with our previous work in food-restricted male rats, we identified possible gender differences in the response to food restriction. Females appear to preserve lean mass to a greater degree than male rats by utilizing relatively more fat for energy needs. This preference for fat as a fuel during negative energy balance suggests that females would lose less body weight for a given reduction in carcass energy than males, since fat is calorically denser than lean mass.

Citations

Jul 27, 2007·American Journal of Physiology. Cell Physiology·A ValleJ Oliver
Nov 10, 2001·American Journal of Physiology. Endocrinology and Metabolism·B MittendorferS Klein
Feb 21, 2007·Cellular Physiology and Biochemistry : International Journal of Experimental Cellular Physiology, Biochemistry, and Pharmacology·Bartomeu ColomFrancisco J García-Palmer
Apr 13, 2010·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Rogerio G PedrosaJulio Tirapegui
Sep 1, 1993·Obesity Research·G W Reed, J O Hill
Feb 11, 2005·American Journal of Physiology. Endocrinology and Metabolism·A ValleP Roca
Feb 21, 2007·Cellular Physiology and Biochemistry : International Journal of Experimental Cellular Physiology, Biochemistry, and Pharmacology·Adamo VallePilar Roca
Jan 1, 1992·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·M A GriggioJ Leblanc
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Mar 14, 2018·Hormones and Behavior·Tiffany Y Yang, Nu-Chu Liang
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