As far as motivations to run go, being chased by zombies is a very compelling one.
Zombies, Run! is an app that blends fitness tracking with some light gamification to create a more interesting way of staying in shape. Pitching you into a standard zombie apocalypse scenario through audio snippets piped into your headphones, the game feeds you instructions and updates whilst your phone keeps track of how far you have run and how quickly you are running.
The gamification elements come from supplies that you ‘find’ whilst out for your run. Once you’re back at home and collapsing on the sofa in a sweaty mess, you can spend these resources to build up your virtual survivor town with new buildings to help other inhabitants of your post apocalyptic world.