The Nike Experiment: How the Shoe Giant Unleashed the Power of Personal Metrics

...Noone has joined the legion of people, from Olympic-level athletes to ordinary folks just hoping to lower their blood pressure, who are plugging into a data-driven revolution. And it goes way beyond Nike+. Using a flood of new tools and technologies, each of us now has the ability to easily collect granular information about our lives—what we eat, how much we sleep, when our mood changes.