This is just genius, a running app with a built in zombie story. The story will make you more motivated or what do you think about:

“You tie your shoes, put on your headphones, take your first steps outside. You’ve barely covered 100 yards when you hear them. They must be close. You can hear every guttural breath, every rattling groan – they’re everywhere. Zombies. There’s only one thing you can do: Run!”

See the trailer for the game below: