Abstract
The effect of repeated food restriction-refeeding (weight cycling) on macronutrient selection and adiposity was investigated in female Sprague-Dawley rats. Rats were maintained on ad lib macronutrient self-selection and were put on one of two types of restriction. One group was reduced to 75% of their body weight on restricted amounts of chow and a second group was given ad lib chow during the concurrent period and were voluntarily hypophagic. During refeeding on macronutrient self-selection, animals previously restricted selected a higher percentage of dietary fat, had larger adipose depots and plasma insulin values, and had lower heart weights both expressed in grams and as a percentage of body weight than non-restricted groups. This suggests that both severe and moderate periods of restriction may have negative health consequences.
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