For years, runners have been able to take advantage of Nike+, a nifty accessory that lets your iPod communicate with your shoes to turn it into a personal running coach of sorts. Soon, cyclists will have access to a tool that's in the same vein as Nike+, but far more powerful. It's called Pedal Brain, and it allows your iPhone or iPod Touch to receive and interpret data from a variety of exercise devices that use the ANT+ wireless protocol. ANT+ is used by cyclists (including many professionals) to accurately measure and analyze their performance over a ...

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