I don't know about you but I seem to get a better pump using one arm cable curls as opposed to dumbbell s . Maybe it's the constant resistance it offers me. I'm not claiming it to build better muscle but ill throw it in to start out my workout, loosen up and then blast some heavy sets and really isolated movement and it jacks my arms up better compared to days I use other routines.
I know a lot of guys would disagree but my body doesn't seem to care what type of weight is tearing the muscle as long as it is a constant resistance with no rest top or bottom. That's when I grow and how I succeed! What works for you beasts and vets?