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

doi:10.3969/j.issn.1674-5817.2014.04.007

Abstract

Abstract: Objective 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 adipose tissue mass, muscle tissue mass, bone mineral density and serum TG levels between normal-weight and obese rats.

Key words: Aerobic endurance exercise, Obesity, Diet consumption, Body composition, Blood lipids

CLC Number:

Q95-33

ZHANG Yun-li, CAI Ming, LI Jing-jing, XIN Lei, LOU Shu-jie. Effects of Eight Weeks Aerobic Endurance Exercise on Food Consumption, Body Composition, and Blood Lipids in Normal and Obese Rats[J]. Laboratory Animal and Comparative Medicine, 2014, 34(4): 294-298.

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