"Zombies detected!" Ft really shouldn't work, but somehow you'll come to crave and dread those two words as they trigger yet another 30-second sprint for survival. The fact that youell obey probably says more about the addictive challenge of run-tracking apps than it does about the voice acting in Zombies, Run!, but there's no denying its popularity: half-a-million runners enjoy their One Direction interspersed with the wanton slaughter of zombies.
