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Body Weight and Depot Fat Changes As Influenced by Exercise and Dietary Fat Sources in Adult BHE Rats

Department of Human Nutrition and Foods, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061

Adult male BHE rats were fed diets containing 15% of either corn oil (CO) or medium chain triglycerides (MCT) as the dietary source of fat. Further, rats were allowed to remain sedentary or were forced to exercise by swimming for 1 hour daily, for 3 weeks, followed by swimming for 2 hours daily for 3 weeks. The exercise for 3 weeks caused significant reductions in average body weight gains. After 6 weeks of exercise the lipid content of the adipose cells was reduced by about 50%. Fat cell numbers were not changed by either fat source or exercise, but fat cell size was significantly reduced after swimming daily for 6 weeks.

KEY WORDS: • fat source • exercise • fat cells

¹ Present address: Division of Biochemical Development and Molecular Diseases, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104.

Manuscript received 27 March 1978.