Veronica Noone attached a small sensor to her running shoes and headed out the door. She pressed start on her iPod and began keeping track of every step she took. It wasn't a long run—just 1.67 miles in 18 minutes and 36 seconds, but it was the start of something very big for her.
Since that day, she's run 95 more times, logging 283.8 miles in about 48 hours on the road. She's burned 28,672 calories. And her weight, which topped 225 pounds when she was pregnant, has settled in at about 145.
Noone knows all of that thanks to the sensor system, called Nike+. After each run, she can sync her iPod to the Nike+ Web site and get a visual representation of the workout—a single green line. Its length shows how far she's gone, and the peaks and valleys reflect her speed.
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