Effects Of Acute Resistance Exercise On Executive Function Of College Students And Its Brain Mechanism

Executive function plays a very important role in daily life and is closely related to the quality of individual life.Previous studies have shown that resistance exercise can improve executive function performance,but the relationship between resistance exercise and executive function is unclear.Brain imaging technology can help reveal the relationship between resistance exercise and executive function.Previous studies have mostly used resistance exercise with different intensities to study its impact on executive function,while other training factors have been less explored.Therefore,this study combined the amount of exercise to study the impact of resistance exercise on executive function of college students,and elucidated the brain mechanism of resistance exercise promoting executive function performance from the perspective of changes in prefrontal blood oxygen.The study selected 64 college students as research subjects and randomly divided them into three experimental groups with different amounts of exercise(low,medium,and high)and a control group.The three experimental groups were subjected to moderate intensity resistance exercise with different numbers of exercise groups(2sets,4 sets,or 6 sets),while the control group watched videos.The performances of three sub-functions of executive function of college students in each group before and after resistance exercise were evaluated by using stroop,2-back,and More-odd shifting tasks.Use fNIRS technology to collect data on prefrontal lobe blood oxygen signals,and use relevant software to analyze the differences in prefrontal lobe blood oxygen signals before and after exercise intervention.The inhibitory control post-tests of each experimental group were better than the pretests,and the improvement effect was as follows: low exercise volume group>high exercise volume group>medium exercise volume group>control group.Compared with the control group,the post-tests of each experimental group were significantly better than the control group;The post-tests of working memory in each experimental group were superior to pretests,and the improvement effect was as follows: moderate exercise group>high exercise group>low exercise group>control group.Compared with the control group,the post-tests of the experimental group were not significantly superior to the control group;The post-tests of cognitive flexibility in each experimental group were better than pretests,and the improvement effect was as follows: high exercise volume group>low exercise volume group>moderate exercise volume group>control group.Compared with the control group,the experimental group with low and moderate exercise volume was not significantly superior to the control group,while the experimental group with high exercise volume was significantly superior to the control group.FNIRS results: In the high activity group,the activation of blood oxygen in the right dorsolateral prefrontal lobe was significantly higher than the pretest in the inconsistent task of inhibitory control,and in the mixed task of cognitive flexibility,the activation of blood oxygen in the left dorsolateral prefrontal lobe was significantly higher than the pretest,which was related to executive function.A single moderate intensity resistance exercise with different amounts of exercise has a selective impact on the executive function of college students.That is,compared to the control group,moderate intensity resistance exercise with different amounts of exercise significantly improves inhibitory control,does not significantly improve working memory under different amounts of exercise,and only significantly improves cognitive flexibility under high amounts of exercise.Single moderate intensity resistance exercise can significantly improve the activation level of the dorsolateral prefrontal lobe of the brain during partial executive function testing in college students under high exercise load conditions,which may be one of the brain mechanisms that resistance exercise can significantly improve partial executive function of college students.