Kokalas Nikos, Petridou Anatoli, Nikolaidis Michalis G, Mougios Vassilis
Department of Physical Education and Sport Science, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
Br J Nutr. 2005 Nov;94(5):698-704. doi: 10.1079/bjn20051530.
Exercise prior to eating has repeatedly been shown to reduce postprandial lipaemia. The aim of the present study was to investigate whether this effect was manifest in the presence of two factors that independently mitigate postprandial lipaemia: eumenorrhoea and moderate fat intake. Eight healthy eumenorrhoeic rowers consumed a meal of moderate fat content (35 % total energy, 0.66 g/kg body mass) 14 h after having either rowed at 55 % of maximal aerobic power (81 % of maximal heart rate) for 80 min or rested. Both trials were performed during the luteal phase. Blood samples were drawn before the meal and for 8 h postprandially for the measurement of individual fatty acids in the triacylglycerol and NEFA fractions, as well as of glucose, insulin and oestradiol. Plasma oestradiol concentrations were not significantly different in the two trials. The postprandial lipaemic response, expressed as either plasma triacylglycerol concentration or area under the triacylglycerol-time curve, was 35 % lower (P<0.05) after exercise. The postprandial glycaemic and insulinaemic responses were also lower, indicating increased insulin sensitivity, whereas the NEFA response was higher, suggesting a lower entrapment of dietary fatty acids in adipose tissue after exercise. Finally, exercise increased the proportion of unsaturated:saturated NEFA during the postprandial period. In conclusion, aerobic exercise performed 14 h before a moderate-fat meal reduced postprandial lipaemia in women in the luteal phase. This effect shows the potential of exercise to mitigate even moderate lipaemic responses in eumenorrhoeic women.
进食前运动已被反复证明可降低餐后血脂。本研究的目的是调查在两个独立减轻餐后血脂的因素存在的情况下，这种效果是否明显：正常月经和适度脂肪摄入。八名健康的有正常月经的赛艇运动员在以最大有氧功率的55%（最大心率的81%）划艇80分钟或休息14小时后，食用了一顿脂肪含量适中的餐食（总能量的35%，0.66克/千克体重）。两项试验均在黄体期进行。在进餐前和进餐后8小时采集血样，以测量三酰甘油和非酯化脂肪酸（NEFA）组分中的单个脂肪酸，以及葡萄糖、胰岛素和雌二醇。两项试验中血浆雌二醇浓度无显著差异。运动后，以血浆三酰甘油浓度或三酰甘油-时间曲线下面积表示的餐后血脂反应降低了35%（P<0.05）。餐后血糖和胰岛素反应也较低，表明胰岛素敏感性增加，而NEFA反应较高，表明运动后膳食脂肪酸在脂肪组织中的滞留较低。最后，运动增加了餐后不饱和:饱和NEFA的比例。总之，在食用中等脂肪餐食前14小时进行有氧运动可降低黄体期女性的餐后血脂。这一效果显示了运动在减轻有正常月经女性即使是中等程度血脂反应方面的潜力。
