Young male rats were alternately meal-fed on a basal diet and a 35% sucrose diet for 7 weeks. The sucrose diet was fed at 0800-0900 hours (experiment 1) or at 2000-2100 hours (experiment 2), and the basal diet was fed at 2000-2100 hours (experiment 1) or at 0800-0900 hours (experiment 2). In both experiments, animals were divided into sedentary group and exercise group. Rats of exercise group were allowed to run voluntarily in revolving wheels between 2100-0800 hours. After 7 weeks of feeding, plasma triacylglycerol level was significantly lower in exercised rats as compared with sedentary rats regardless of the timing of the sucrose meal. Hepatic-intestinal triacylglycerol production rate was also significantly lower in exercise group than in sedentary group. However, lipoprotein lipase activity of several tissues was not significantly different between the groups. These results seem to suggest that voluntary running exercise may be effective in lowering the hyperlipemic effect of sucrose by decreasing triacylglycerol production.

DESCENTE SPORTS SCIENCE Vol.3/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE