Could someone explain how the serratus anterior would help with any rowing or pulldown motion, straight-arm or otherwise? It's function is to elevate, rotate up, abduct/protract the scapulae, as well as just hold them on.
I've seen other people saying that these pullover/lat motions somehow help the serratus, who has an idea where this idea originates and why the muscle would do this? Based on explanations I've read of the muscle I don't see it.
Even lower traps are kinda confusing. If you wanted to work their function as a depressor then why not have the bar overhead and 'reverse shrug down'? If you wanted to work their function as a retractor, that happens when you work the whole trap or lat with rowing motions.