Your ‘input action run’ should plug into a ‘set player walk speed’ node. When it is pressed you ‘set’ the speed to your running speed, un-pressed you set the speed to your walking speed. Or you could use a timeline (I think) to slowly speed the character up when the button is pressed and then ‘reverse’ it when the button is un-pressed. Here’s the tutorial: Unreal Engine 4 Tutorial - Basic Sprint System - YouTube