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Links Short-term weight cycling in aging female rats increases rate of weight gain but not body fat content.Pellizzon MA, Buison AM, Jen KL.Department of Nutrition and Food Science, weight loss Wayne State University, Detroit, MI 48202, USA.OBJECTIVE: To examine the effects of short-term repeated weight cycling (WC) above and below the baseline (BL) body weight (BW) on body weight regulation, feeding weight loss efficiency, and fat content in old female Wistar rats when dietary fat content was kept constant. DESIGN: Completely randomized. ANIMALS AND METHODS: Female Wistar rats, 11 months weight loss old at the beginning of the study, were randomly divided into six groups (12 per group) after a group of rats (BL) was sacrificed for baseline data collection: the high fat gain (HFG) group gained weight to 20% above the BL weight with a high fat diet (HF) and returned to BL level by food restriction (50% of ad-libitum amount) for five cycles; the high fat loss (HFL) group lost weight to 20% below the BL weight by food restriction (50% of ad-libitum amount) and regained to BL level by ad-libitum feeding for four cycles; the high fat ad-libitum (HFA) and low fat ad-libitum (LFA) groups were fed HF and low fat (LF) diet, respectively,
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