|（1.School of Physical Education and Health，Guangzhou University of Chinese Medicine，Guangzhou 510006，China；2.School of Physical Education，South China University of Technology，Guangzhou 510641，China 3.Laboratory of Laser Sports Medicine，South China Normal University，Guangzhou 510006，China）
Abstract: In order to probe into the enhancement of the quality of oxidant-antioxidant homeostasis (OAH) by high intensity exercising, the authors divided 30 SD rats randomly into a training intervention group and a calm control group. The rats in the training intervention group ran on a treadmill for 8 weeks under such conditions as 10% slope, 28m/min, 60min/time, 1 time/day, 5 days/week, while no exercising intervention measure was taken for the rats in the calm control group. Gastrocnemius muscle and blood serum were sampled at 72h after the last round of training. The test indexes were malondialdehyde (MDA), total superoxide dismutase (TSOD), catalase (CAT) and reduced glutathione (RGSH) in skeletal muscle and blood serum. The authors revealed the following findings: the content of RGSH and the activity of TSOD in skeletal muscle and blood serum increased significantly; MDA decreased sig-nificantly in blood serum, but increased significantly in skeletal muscle; the activity of CAT increased significantly in blood serum, but remained unchanged in skeletal muscle. The experiment indicated that high intensity training can realize the enhancement of OAH of SD rats.
Key words: sports biochemistry；redox; homeostasis；high intensity exercising；rats