The Effects of caloric density of the food on running endurance and general condition of rats and hamsters restricted in food intake or fed ad libitum
1975
Tollenaar, D.
Abstract: Young, adult, male rats and hamsters, after a treadmill training period, were divided into six groups. The groups recieved 20, 40, or 70% dietary fat calories fed ad libitum or 40% by weight of average ad libitum intake. The latter figure was 80% for hamsters under tropical conditions. All animals were run to exhaustion once a week. Increased dietary fat level was not correlated with superior running performance at either food intake level, although during restricted feeding the high fat groups received more calories. Increased running endurance and kgm performance were correlated with lower body weight at both food intake levels. Rate of performance increase was higher for the low-fat than high-fat rat group, with decreasing body weight during food restriction. Water consumption was lower during restricted feeding. Plasma glucose in rats was lowest for the 70% level at both levels of intake; lower from day 8 on during restricted feeding; lower on day 15 than on day 8 of restricted intake. Hamster average plasma triglyceride levels were 76% and plasma total cholestral levels 22% higher in non-exercised than regularly exercised animals right after running to exhaustion.
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