Anti-stagger enchant/effect

[Aetherderius]

I'm making a mod that would add a shield that stops you being staggered. There isn't much information regarding staggering out there, so I was hoping you guys might be able to help me.

I think it's got something to do with 'Mass' in the CK, but for the life of me I can't figure it out.

 

Any help would be appreciated.