|（School of Psychology and Center for Studies of Psychological Application，South China Normal University，Guangzhou 510631，China)
Abstract: In order to reveal the characteristics of EEG activity during Taijiquan exercising at different speeds, the author carried out the experiment and research by selecting 6 strictly trained and screened testees who had no sig-nificant differences in Taijiquan cognition and exercising characteristics. The results indicate that intentionally re-ducing Taijiquan exercising speed at one time cannot enhance, but on the contrary, will weaken the original effect of cerebral cortex neurons synchronization activity in the process of Taijiquan exercising. Moreover, since it is one time exercising without the accumulation of exercising effect, and the exercising time is not long, the change of neural activity during exercising at two speeds cannot last up to the eyes closed still sitting process after exercising.
Key words: sports physiology；electroencephalogram；exercising speed；Taijiquan