Listen up, Running zombies are nothing new!
If your familar with the mainstream horror flicks like "Dawn of the Dead"(2004) and "28 Days Later".. saying they running zombies are new, WRONG!
They have existed before in early foreign horror movies that you should definitely watch! there was of course Umberto Lenzi's 1980 Horror/Sci-fi/action shocker "Nightmare City" ( a.k.a. City of the Walking Dead) which featured the first running zombies but these zombies also drove cars, have cruddy faces, and weild weapons including sucking blood like vampires.
Then there was "Lifeforce", "Return of the Living Dead trilogy", 'The Stuff" and "Zombi 3" that also had zombies that ran.