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When I wrote about the four things that help make running/interval training more tolerable for me, I mentioned that Nike+iPod sports gadget that allows you to track your mileage/calories while syncing with your tunes. Mimi commented on my post and said that she wants to look in to the tool, but doesn't want to switch running shoes to accommodate the sensor that monitors your movement. Good news, Mims, you don't have to change a thing. When Nike+iPod was first released a few years ago, Nike, of course, was the only shoe brand that had cut-outs for the sensor that tracked...