Abstract: Objective:This study was designed to investigate the effects of different acute exercise intensity on respond inhibition ability in early adults.Methods:Behavioral data and eventrelated potentials (ERPs) were recorded after subjects be divided into three exercise intervention 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 exercise group, moderate intensity group exhibited lower peak Go N2amplitude (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 intensity 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 promote respond inhibition ability.There is an inverted-U relationship between intensity and respond inhibition ability.This result enriches the theory of inverted-U hypothesis.