The Effect Of Exercise Intensity And Trait Anxiety On Selected Attentional Bisa : Evedience Of ERP Study

In the field of exercise psychology,there are a lot of researches on the psychological benefits of physical exercise, along with the result that physical exercise can reduce the lelvel of anxiety. However,most of the researches are still at the level of behavioral science,and there is lack of ERP research in China. State trait anxiety theory defines trait anxiety as a relatively permanent and stable personality trait. In recent years, the relationship between trait anxiety and attentional bias has been the focus of research. Attentional bias is that individuals are highly sensitive to specific stimuli and are accompanied by selective attention. High trait anxiety is more sensitive to threat information.In this study, we used the three-factor mixed design of 4 (exercise intensity, high,medium, low, no) X 2 (emotional picture, negative, neutral) X 2 (anxiety level, high trait,low trait) The level of anxiety and exercise intensity were the factors between the subjects, the emotional picture was the internal factors. There were four groups of subjects in the self-variable of exercise intensity, including high, medium and low three groups which run in the indoor treadmill and heart rate was in order 170 to 180 times / min, 140 to 150 times / min,110 to 120 times / min of the exercise, and each group of subjects were exercise for 30 minutes; the remaining exercise group just quietly sit for 30 minutes. After exercise, all subjects were judged by emotional images while measuring their ERP indicators. Results showed that : 1)the high trait anxiety (HTA) group exhibited a enhanced N1 in comparison to the low trait anxiety group(LTA), moderate and high intensity of the exercise shorten the incubation period of N1; at low trait anxiety levels, high intensity exercise raises a larger N1 than moderate intensity exercise.2) In the high and low trait anxiety level, the neutral picture poses a larger N2 than the negative picture. 3) In the low trait anxiety level,the negative picture induced P3 was significantly larger than the neutral picture; in the high trait anxiety level, the neutral picture induced SW amplitude was significantly larger than the negative picture.The study concluded : 1)moderate intensity exercise is better than high-intensity exercise to ease anxiety for low trait anxiety ,but there is no such effect for high trait anxiety. 2)High trait anxiety devoted more attention to negative emotions on the picture in the early processing and later for the neutral mood picture,and its suppression function may be damaged.3)Low trait anxiety devoted more attention to neutral emotions on the picture in the early processing and later for the negative mood picture.4)High intensity and moderate intensity of exercise can improve the thinking sensitivity of high trait anxiety.