Gill J M, Hardman A E
Human Muscle Metabolism Research Group, Department of Physical Education, Sports Science, and Recreation Management, Loughborough University, United Kingdom.
Am J Clin Nutr. 2000 Feb;71(2):465-71. doi: 10.1093/ajcn/71.2.465.
The mitigating effect of exercise on postprandial lipemia may be attributable to the energy deficit incurred.
We aimed to compare the effects of prior exercise and an equivalent energy intake deficit on postprandial lipemia.
Eleven postmenopausal women participated in 3 oral-fat-tolerance tests after undergoing different treatments on the preceding day: control (subjects refrained from exercise and consumed a prescribed diet), exercise (subjects consumed the same diet but walked briskly for 90 min), and intake restriction (subjects' food intake was restricted to induce the same energy deficit, relative to control, as brought about by the 90-min walk). Venous blood samples were obtained after subjects fasted overnight, 30 min after they ate a mixed, high-fat meal (1.70 g fat, 1.65 g carbohydrate, and 99 kJ/kg fat-free body mass), and hourly for the next 6 h.
In the exercise trial, the mean fasting triacylglycerol concentration was 19% and 17% lower than the control and intake restriction values, respectively (P < 0.05 for both). Compared with the control trial, exercise reduced postprandial lipemia by a mean of 20% (P < 0.05), whereas intake restriction reduced it by 7% (NS). In the exercise trial, fasting and postprandial fatty acid concentrations were higher than control values (P < 0.05). Exercise, but not intake restriction, reduced postprandial insulin concentrations.
The results suggest that the effect of exercise on postprandial lipid metabolism was greater than and different from that attributable to the energy deficit incurred.
运动对餐后血脂异常的缓解作用可能归因于由此产生的能量不足。
我们旨在比较先前运动和等量能量摄入不足对餐后血脂异常的影响。
11名绝经后女性在接受不同处理后的次日参加了3次口服脂肪耐量试验：对照组（受试者不运动并食用规定饮食）、运动组（受试者食用相同饮食但轻快步行90分钟）和摄入限制组（受试者的食物摄入量受到限制，以产生与90分钟步行相对于对照组所带来的相同能量不足）。受试者过夜禁食后、食用高脂混合餐（1.70克脂肪、1.65克碳水化合物和99千焦/千克去脂体重）30分钟后以及接下来6小时每小时采集静脉血样。
在运动试验中，平均空腹三酰甘油浓度分别比对照组和摄入限制组的值低19%和17%（两者P<0.05）。与对照试验相比，运动使餐后血脂异常平均降低20%（P<0.05），而摄入限制使其降低7%（无统计学意义）。在运动试验中，空腹和餐后脂肪酸浓度高于对照组值（P<0.05）。运动而非摄入限制降低了餐后胰岛素浓度。
结果表明，运动对餐后脂质代谢的影响大于且不同于由能量不足所导致的影响。
