Animation blending

Hi! I have two animations. One is Run, the other is Fist. I want my charater to play the Fist animation while Run animation is being played. I tried using animation.blend but fist doesn’t seem working well

First animation plays well when used alone.

But when I blend it with Run animation, It doesn’t work good.

52163-ekran-goruntusu-13.png

I think If I can make the Run animation not to play the Arm when Fist is being played, I can make the Fist work. I’m not sure though.
Thanks!

You would have model with humanoid(Rigged), with two animation clips for both animation action. after refere this link Unity - Manual: Animation Layers