Inside The Crazy Google Glass Fitness App That Makes You Run For Your Life

Need some motivation for your run? Now you can have zombies chase you.

If you're a runner, one of the easiest ways to keep track of your speed and distance is with a smartphone app like MapMyFitness or RunKeeper. These are particularly popular, because you don't even need to look down at your screen to check stats--a voice chimes in every few minutes (or at whatever interval you set) to let you know how you're doing.

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