And it seems to me that decaying muscles and a ruined circulatory system would make for a creature that isn't terribly mobile.I never understood zombies.
They are rotting. So, you just herd them in some area and let them fall apart.
They aren't invincible, since a hammer to the head will kill them. Ergo, natural wear and tear would do them in eventually.
Anyway, sorry. I would prefer getting my head blown off. I would not want to go back to being normal with a stomach full of human flesh, part of my face missing, limbs ripped off and zombie bite marks all over me.