8周有氧耐力运动对正常和肥胖大鼠摄食量、身体成分和血脂的影响

目的 探讨8周有氧耐力运动对体质量正常和肥胖大鼠摄食量、身体成分和血脂影响的差异性.方法 采用高脂饮食建立营养性肥胖大鼠模型,然后将肥胖模型大鼠随机分为肥胖安静组（OC组）和肥胖运动组（OE组）,另设普通饲料安静组（NC组）和普通饲料运动组（NE组）,运动组进行8周有氧耐力运动.整个实验过程中每日计算摄食量,运动干预结束后,应用双能X线骨密度仪测量大鼠身体成分,全自动生化分析仪检测血脂.结果 1）NE组第1、4、7周的摄食量均显著低于NC组（P＜0.05）;OE组第1、2、3、4、6、8周的摄食量均显著低于OC组（P＜0.05）.2）与OC组比较,OE组全身脂肪组织量和全身脂肪百分比均显著下降（P＜0.05）,但NE和NC组间均无显著差异（P＞0.05）.3）OE组全身肌肉组织量和全身肌肉百分比均显著高于OC组（P＜0.05）,但NE和NC组间均无显著差异（P＞0.05）.4）NE组全身骨密度显著高于NC组（P＜0.05）,但OE和OC组间无显著差异（P＞0.05）.5）OE组血清TG水平显著低于OC组（P＜0.05）,但NE和NC组间无显著差异（P＞0.05）.结论 相同强度的有氧耐力运动对体质量正常和肥胖大鼠的摄食量、脂肪组织量、肌肉组织量、全身骨密度以及血清TG水平的影响存在差异性.

Effects of Eight Weeks Aerobic Endurance Exercise on Food Consumption,Body Composition,and Blood Lipids in Normal and Obese Rats

To study the differences of food consumption, body composition and blood lipids between normal-weight and obese rats during eight weeks aerobic endurance exercise. Methods Firstly, a rat model of nutritional obesity was established by feeding with a high-fat diet, and then these obese rats were randomly divided into two groups, obesity control （OC） group, and obesity exercise （OE） group.In addition, a normal control （NC） group and a normal exercise （NE） group were set up. After grouped, the exercise groups were arranged for eight weeks aerobic endurance exercise. During the experimental period, diet consumption of the rats was measured every day afternoon. After the exercise intervention, body composition of the rats was determined with Prodigy dual-energy X-ray absorptiometry, and blood lipids with the automatic biochemistry analyzer. Results 1） Diet consumptions of 1,4,7-week in NE group were significantly lower than that in NC group （P〈0.05）; Diet consumptions of 1,2,3,4,6,8 -week in OE group were significantly lower than that in OC group （P〈0.05）; 2） Compared with OC group, whole-body adipose tissue mass and body fat percentage were significantly decreased in OE group （P〈0.05）, but there was no significant difference between NE group and NC group （P〉0.05）; 3）Whole-body muscle tissue mass and muscle percentage in OE group were significantly higher than that in OC group （P〈0.05）, but there was no significant difference between NE group and NC group （P〉0.05）; 4）Whole-body bone mineral density in NE group increased, was significantly greater than that in NC group （P〈0.05）, but there was no significant difference between OE group and OC group （P〉0.05）; 5） serum TG levels in OE group were significantly lower than that in OC group （P〈0.05）, but there was no significant difference between NE group and NC group （P〉0.05）. Conclusion The same intensity aerobic endurance exercise caused different effects on food consumption, whole-body