Postprandial lipemia is an independent risk factor for atherosclerotic diseases. Although aerobic exercise on regular basis is known to have beneficial effects on fasting levels of serum lipids, its effect on postprandial lipemia is still largely unknown. In this study we examined the chronic effects of long-term exercise on postprandial lipid response in healthy subjects. Healthy elderly subjects (13 men and 15 women, mean age; 68±8 yr.) attended a three-month aerobic exercise training program, and underwent a 70g oral fat tolerance test (OFTT) before and after this program. After the exercise program, change in serum TG (DTG) level in the OFTT was significantly decreased after the program, from 96.6±63.0mg/dl to 79.4±56.5mg/dl (p<0.05) although change in mean fasiting TG levels was not significant. The postprandial fat response is correlated with indices representing insulin resistance in elderly subjects. This response is improved by long-term aerobic exercise even if the intensity of exercise is not enough to significantly lower baseline serum levels of TG.

DESCENTE SPORTS SCIENCE Vol.26/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE