To explore the effects of exercise training under different velocities on the , the experimental fish were divided into four groups at (250 bl/s, 1.0 bl/s, 2.0 bl/s, 4.0 bl/s) for 8 weeks, the exercise training induced adaption of the antioxidant enzyme system of muscle, the activity of superoxide dismutase (SOD) and glutathione peroxidase (GSH-P_X) increased with the increasing water velocity, while the activity of catalase (CAT) dropped in varying degrees. No significant differences in the level of (GSH) was observed among the treatments with various velocities. Compared with the control group, the content of the total antioxidant capacity increased in the trained group, the maximum values were in the water velocity of 2.0 bl/s, the second maximum values were in 4.0 bl/s, with significant differences with control . At the end of experiment, the level of MDA in the group of 2.0 bl/s decreased significantly2 increased with the increasing water velocity. Compared with the control group, no significant differences in the content of Bcl-2, Bax and the activity of CK were found among treatments(>0.05), however the ratio between Bax and Bcl-2 of 4.0 bl/s was significantly higher than that of 2.0 bl/s(<0.05). The results showed that the exercise training under 2.0 bl/s could effectively improve the antioxidant function, decrease lipid peroxidation level, and inhibit muscle cell apoptosis of juvenile