目的：研究不同强度的急性有氧运动与抑制能力的关系，并了解其中的认知过程特征及其脑神经活动特点，为科学地制定运动处方提供理论依据。方法：将久坐大学生随机分为4组，包括3个运动干预组和1个阅读控制组，采用Go/NoGo范式测量其抑制能力，记录行为数据和ERP数据，探讨急性有氧运动的不同强度与抑制能力的剂量关系。结果：1）3个运动组的NoGo正确率显著高于控制组，其中，中等强度组最大（ P＜0．001）；2）中等强度组的Go N2波幅显著低于控制组和大强度组（ P＝0．014），大强度组的Go N2潜伏期显著小于控制组和小强度组（ P＝0．034），NoGo N2波幅和潜伏期无组间差异（ P＝0．205；P＝0．302）；3）中等强度组的 Go P3和 NoGo P3波幅显著大于控制组和小强度组，大强度组的Go P3和NoGo P3波幅显著大于控制组（ P＜0．001；P＝0．002），而 P3潜伏期无组间差异（ P＝0．322；P＝0．135）。结论：急性有氧运动能够有效地促进抑制能力，并且是有选择性地提高难度较大任务的成绩；急性有氧运动强度与抑制能力呈倒 U 型曲线关系，其主要机制在于完成任务过程中能够更加合理地分配认知资源，这一成果也丰富了倒 U假说理论。%Objective :This study was designed to investigate the effects of different acute exer-cise intensity on respond inhibition ability in early adults .Methods :Behavioral data and event-related potentials (ERPs) were recorded after subjects be divided into three exercise interven-tion groups and one reading control group through the adapted Go/NoGo task .Results :1 ) Three exercise groups exhibited higher response accuracy than reading control group ,especially moderate intensity exercise group (P< 0 .001) .2) Compared to reading and high intensity ex-ercise group ,moderate intensity group exhibited lower peak Go N2 amplitude ( P= 0 .014 ) . N2 latency was shorter in high intensity exercise group than that in reading and low intensity ( P= 0 .034 ) .But there is no significant NoGo N2 amplitude difference among goups ( P=0 .205;P=0 .302) .3) The Go P3 and NoGo P3 peak amplitude were higher in moderate in-tensity group than that in reading and low intensity group .And that in high intensity group were higher than that in reading group (P< 0 .001 ;P= 0 .002) .But there is no significant P3 latency difference among goups ( P= 0 .322 ;P= 0 .135 ) .Conclusion :Acute exercise can pro-mote respond inhibition ability .There is an inverted-U relationship between intensity and re-spond inhibition ability .This result enriches the theory of inverted-U hypothesis .
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