There are plenty of wearable devices that can track your athletic performances. If you are a runner, chances are you want a device that can tell you more about your sessions. The runScribe could be just what you need. It is a lightweight device that mounts on the back of your shoe and has a 9-axis sensor to capture the movements of your foot while you run. It provides you with reports on 13 kinematic metrics to help you train smarter and avoid injuries.
The device is lightweight and does not get in your way. Its onboard flash memory stores your runs and syncs them wirelessly to your iOS or Android device. Crowdsourcing data helps all runners in the community benefit in the long run. The device runs over 30 hours from a CR2302 lithium battery. It is on Kickstarter right now.