Abstract: In order to investigate the effect of continuous exercise training on the swimming performance and respiration metabolism of Takifugu obscurus during proliferation and release activities, the critical swimming speed (U_crit), burst swimming speed (U_brust), resting metabolic rate (RMR) and active metabolic rate (AMR) of T. obscurus were measured after exercise training at different intensities (0.75 and 1.5 BL/s) and durations (1, 2 and 4 weeks). The results showed that after 1 week of continuous training at low intensity (0.75 BL/s), U_brust, RMR and AMR had no significant changes, while U_crit was significantly increased. Following 2 weeks of continuous training, U_crit, U_brust, RMR and AMR remained reletively stable. After 4 weeks of continuous training, U_brust and RMR showed no significant change, while U_crit decreased significantly (P<0.05) and AMR increased significantly (P<0.05). After 2 weeks of high intensity (1.5 BL/s) training, there were no significant changes in U_crit, U_brust, RMR and AMR of T. obscurus. After 4 weeks of continuous training, U_crit, U_brust and RMR did not change significantly, while AMR decreased significantly (P<0.05). The results showed that short periods of low-intensity training (0.75 BL/s training for 1 to 2 weeks) improved the critical swimming capacity of T. obscurus, while continuous low-intensity training (0.75 BL/s training for 2—4 weeks) increased the active metabolic rate of T. obscurus. Therefore, proper exercise training may play a certain role in improving the swimming capacity of T. obscurus after releasing, which is helpful to improve the survival rate and releasing effect.