Here’s an idea; imagine an app based game that connects to gym equipment via bluetooth and rewards the player for exercising.

Tweet by Erin Organa Fisher (@RoseofTarth)
like, what kinda rewards? interesting concept. there's a few already that entice users to work out and actually get paid ....
This would be awesome if it was connected to an adventure game. I could imagine it gives you tasks like "travel from [Location 1] to [Location 2] to deliver [Item 1] to the Lord of Dereth." Hop on a treadmill and travel. Or "lift boxes of fruit onto the cart." Overhead press. Etc
That's pretty much the concept of the "Zombies, Run!" app