(1.School of Physical Education,South China Normal University,Guangzhou 510006,China;2.School of Physical Education,Henan University,Kaifeng 475001,China) Abstract: The authors established a type 2 diabetic rat model by means of high fat feeding plus intraperitoneal injec-tion of a small dose of streptozotocin (STZ), probed into the role of exercising in improving the myocardial fibrosis of type 2 diabetic rats, and revealed the following findings: as compared with those of the rats in the normal control group, the blood GLU, GHb, GSP and INS level as well as myocardium AGEs, Hyp, CVF, GSSG/GSH, MDA and NF-κB P65 protein expression of the rats in the diabetic control group increased significantly (P<0.05 or P<0.01); as compared with those of the rats in the diabetic control group, the blood GLU, GHb and GSP level as well as myocardium AGEs, Hyp, CVF, GSSG/GSH, MDA and NF-κB P65 protein expression of the rats in the diabetic exercising group decreased significantly (P<0.05 or P<0.01). The said findings indicated the followings: the type 2 diabetic rat model duplicated by this experiment showed such a sign as myocardial fibrosis; exercising could improve the fasting blood glucose of type 2 diabetic rats, lower myocardial tissue’s AGEs content, oxidative stress and the level of NF-κB P65 protein expression, play a role in improving the myocardial fibrosis of type 2 diabetic rats; AGEs or oxidative stress or NF-κB P65 might be an important channel for exercising to improve the myocardial fibrosis of type 2 diabetic rats. Key words: sports biochemistry;type 2 diabetes;exercising;myocardial fibrosis;oxidative stress;rats |