If you're an athlete in search of a way to keep track of you training progress, consider the Armour39 performance monitoring system from Under Armour.

The Armour39 module and chest strap combine to help track any type of performance data imaginable. Hooked up to the chest strap, the moduel stores your biometric info, including heart rate, calories burned, real-time intensity, and transfers it in real time to the Armour39 iPhone App, or the optional Armour39 watch. The adjustable strap features sweat-wicking properties as well as sensor pads to help transmit data.

$150

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