FOR SERIOUS! Matter can't be destoyed or created. and we all know E=MC2 so energy can't be destroyed or created!
So even if zombie ais magical like green lantern and not scientific like ais spiderman!
An simple test would be have to be conducted. at least three different zombies. preferably more. and of course a control. cut off the limb of a zombie. record how long movement occurs in the severed limb. if never, then zombie are magical but if that severed limb ceases movement. Im right and spiderman rools the skools.
with the Chair force science. Army goes rolling along over your theory!