isometric on the way up/down?

I posted this question a while back, but you’re probably the man to ask:

Does anyone know whether there are different training effects from pausing for an isometric contraction during the concentric portion of a rep vs. pausing during the eccentric portion?

I’d rather use a pause during the eccentric portion and lift the load explosively. Pausing during the concentric portion will negate most benefits from that portion.

Thanks, CT! Good to have you back.