Effects of exercise and\or chromium supplementation on food intake and weight gain in ovariectomized retired breeder rats

Document Type

Article

Publication Date

12-1-1997

Abstract

The interactions between ovariectomy and chromium supplementation on weight gain, food intake, and running wheel activity in retired breeder rats were investigated. The nine week study utilizing 46 rats was divided into three phases: 1) pre-ovx, 2) recovery post-ovx, and 3) stabilization post-ovx. All rats were provided ad libitum access to three diet choices each consisting of a predominant macronutrient: high carbohydrate, high fat, and high protein. Ten rats were randomly placed in a sham treatment and were sham operated instead of ovariectomized at the end of phase 1. The remaining rats were placed in one of four treatments and were ovariectomized at the end of phase I: 1) basal treatment (B), 2) basal + exercise (BE), 3) chromium supplemented (1000 ppb)(Cr), and 4) chromium supplemented (1000 ppb) + exercise (CrE). Exercise treatment rats were allowed access to running wheels 12 hr/day, 5 days/week. Exercise decreased fat intake (p<.05) and increased protein intake (p<.0001). Exercise also increased leg muscle weight and decreased abdominal fat weight (p<.05). Ovx, on the other hand, increased caloric intake, weight gain, fat intake, and protein intake (p<.05). Caloric conversion ratio (g wt gain/1000 kcal consumed) also increased due to ovx (p<.0001). There were no beneficial effects of chromium supplementation on any variable. These data suggest that while removal of hormones due to ovx increases fat intake, overall caloric intake, caloric conversion ratio, and weight gain, exercise may help reduce these effects by altering food intake and increasing energy expenditure.

Publication Source (Journal or Book title)

FASEB Journal

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