Whether they are bath salt enthusiasts or Haitians risen from the dead, North Americans are fascinated by zombies.
There is a divide between deadly fans who prefer fast zombies and those who like the traditional shambling slow zombies. I am in the fast zombie camp because slow zombies just aren't that scary.
London-based company Six To Start has taken our fear of these toothy terrors and created an app to motivate exercisers.
My friend Sarah Duff has been using the Zombies, Run! app for a few weeks and says it has added excitment to her daily running routine.
"It's motivated me to go a bit farther. It uses GPS to track your distance as if you are running away from zombies and sees if you can outrun them. There are twenty-two story missions and seven supply missions. In between the story it plays your own music."
Runners can choose a half-hour or full hour mission. Zombies, Run! is available for $7.99 on the iTunes store.