Effect of prior exercise on lipemia after a meal of moderate fat content.
Journal Title: Allergy - Year 2004, Vol 58, Issue 10
Abstract
OBJECTIVE: Prior exercise has been repeatedly shown to reduce lipemia aftermeals of exaggerated fat content (over 60% of total energy). The aim of the present study was to investigatewhether the same applies to meals closer to the composition of the typical Western diet and explore whetherexercise affects the release of dietary fat into the bloodstream. DESIGN: Randomized counterbalanced.SETTING: Laboratory. SUBJECTS: Nine healthy young male volunteers. INTERVENTION: Subjects consumed ameal of moderate fat content (35% of total energy, 0.66 g/kg body mass) 14 h after having either cycledfor 1 h at 70-75% of maximal heart rate or rested. Macadamia nuts were used as the main source of dietaryfat to trace its entry into the circulation because of their unusual fatty acid composition. Blood sampleswere drawn before the meal and for 8 h postprandially. RESULTS: Plasma triacylglycerol concentrationsand total area under the triacylglycerol concentration vs time curve (AUC) were significantly lower afterexercise (P = 0.001 and 0.003, respectively; effect size for the latter, 0.84). However, incremental(above baseline) AUC was not affected by exercise significantly. When controlling for differences inbaseline plasma concentrations, only the fatty acids that were more abundant in the meal than in plasmatriacylglycerols were decreased in the early postprandial period following exercise, implying eithera suppressive effect of exercise on the rate of triacylglycerol release from the intestine or a morerapid chylomicron clearance after meal consumption. CONCLUSIONS: Exercise performed between 15 and 14h before a meal of moderate fat content reduced postprandial lipemia, mainly by lowering fasting triacylglycerols.The effect of exercise on postprandial triacylglycerol metabolism may be mediated, at least in part,by attenuated release of dietary fat from the intestine.
Authors and Affiliations
M Kolifa, A Petridou, V Mougios
Keywords
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Effect of prior exercise on lipemia after a meal of moderate fat content.
OBJECTIVE: Prior exercise has been repeatedly shown to reduce lipemia aftermeals of exaggerated fat content (over 60% of total energy). The aim of the present study was to investigatewhether the same applies to meals clo...