And what you see is this equipment wearing out in an accelerated rate.

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Most of the wearable devices on the market, with names like LUMOback and Fitbit, are meant to capture health-related information about the person wearing them, such as heart rate and posture.

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"Those with wear will continue wearing down their teeth and ... if you keep grinding at this rate, you won't have any teeth, " she said.

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Wearing the armband on a continuous basis will allow minute-by-minute capture of heart rate data, whether you're watching TV or running a marathon.

ENGADGET: BodyMedia's CORE 2 armband tracks your health, or lack thereof