If you're lacking the motivation to go for a jog, 'Git Fit' for iPhone is an app that will rile your competitive spirit because your exercise stats will be visible to your friends.
The package comes with an 8oz handheld gadget that records your heart rate and communicates it via Bluetooth to your smartphone. Designed by Adam Moller, Git Fit for iPhone allows you to share your athletic data with friends, turning sporting into social media.
'Git Fit' for iPhone Turns Working Out into Social Networking
Amelia Roblin — February 1, 2011 — Tech
References: adammoller & yankodesign