[quote=@Onarax]
But at that size he's not gonna have anything going for him.

He's just a giant target for any Grimm coming his way. You need at least some degree of mobility, and dead lifters don't give you that. Like, at all. 

Nevermind that Plate makes little sense in RWBYverse to begin with considering Aura is a thing. 
[/quote]

Strengthens your entire posterior chain fam