“Few things illustrate the power and promise of Living by Numbers quite as clearly as the Nike+ system. By combining a dead-simple way to amass data with tools to use and share it, Nike has attracted the largest community of runners ever assembled—more than 1.2 million runners who have collectively tracked more than 130 million miles and burned more than 13 billion calories.
With such a huge group, Nike is learning things we’ve never known before. In the winter, people in the US run more often than those in Europe and Africa, but for shorter distances. The average duration of a run worldwide is 35 minutes, and the most popular Nike+ Powersong, which runners can set to give them extra motivation, is “Pump It” by the Black Eyed Peas.”