How to slow down character movement speed when puching?

my english is really no good but please help me i can read some english

i just start useing unreal engine 4
i already can click left mouse for punching
but when character is punching the movement speed is the same like sprint speed
i want to slow down when punching

this is my screen shot please help me where i can set movement speed for punching
thank you very much i am not professional unreal engine user but i have a dream to develop my game by myself

Closed, because of duplication: