Paint with Your Feet

Nike + Paint With Your Feet [yesyesno.com] uses some clever data metrics captured by the Nike+ sensor, including speed, consistency and the unique style of each person's run to create a distinctive set of 3D visuals. Participants were able to play with the mapping rules and adjust the composition of their run, such as its color, texture, size and 3D rotation, which was then outputted as a high resolution print and an engraved shoe box to take home.
"If getting healthier isn't enough of an incentive to stick to your daily jogs, perhaps creating artwork out of your efforts will be."

http://infosthetics.com/archives/2011/04/nike_collab_paint_with.html
http://www.swiss-miss.com/2011/04/nike-collab-paint-with-your-feet.html