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All-star performance trackers

Originally Published: May 12, 2011
By Jamie Sorcher

Athletes are suckers for details. If you go for a long run, you don't round up. (Round down? Never!) No, you proudly proclaim that you ran 5.67 miles. The Global Positioning System (GPS), a cluster of satellites bouncing signals around the sky originally designed for military purposes, makes it possible to track every detail from your route to your distance to your speed with laserlike accuracy. The result: more intel for pumping up your confidence and your performance. Here are some of the ...

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