Abstract
To examine the effects of exercise on postprandial serum triglyceride (TG) metabolism, we measured oral and intravenous fat tolerance and chylomicron-TG half-life in highly trained endurance athletes and in a sedentary control group matched for body weight and fasting serum TG concentration. Postprandial lipemia was lower in athletes after meals containing 40 g fat (1.5 ± 0.7 vs 2.6 ± 1.5 mmol·L-1·8 h-1, p < 0.001) or 140 g fat (2.5 ± 1.2 vs 6.1 ± 1.9 mmol·L-1·8 h-1, p < 0.001). The disappearance of an intravenous bolus of Intralipid® was faster in athletes (5.4 ± 1.2%/min) than in sedentary men (4.3 ± 0.8%/min, p < 0.01). The half-life of chylomicron-TG was shorter in athletes (3.0 ± 0.8 min) than in sedentary men (4.0 ± 1.0 min, p < 0.05). These findings indicate that chronic exercise decreases postprandial lipemia by reducing chylomicron-TG's half-life. This effect is due partly to reduced fasting serum TG pool size and partly to a direct effect of exercise on the serum TG removal system.
Original language | English (US) |
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Pages (from-to) | 443-447 |
Number of pages | 5 |
Journal | American Journal of Clinical Nutrition |
Volume | 49 |
Issue number | 3 |
DOIs | |
State | Published - Jan 1 1989 |
ASJC Scopus subject areas
- Medicine (miscellaneous)
- Nutrition and Dietetics