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One heavily studied device is an armband made by Pittsburgh-based BodyMedia Inc. The device, worn by contestants on NBC’s “The Biggest Loser” reality show, is sold as GoWear fit by BodyMedia and as the bodybugg by health-club company 24 Hour Fitness Inc.’s Apex Fitness Group unit. The armband detects not just motion but also skin temperature, heat flux, or the amount of heat leaving the body, and galvanic skin response — a measure of electrical conductivity that changes when you sweat. The information is fed into mathematical equations programmed into the device and aimed at estimating your total daily calorie burn. (via Burn Notice: How Accurate Are Devices That Track Calories Used? - WSJ.com)
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It surely didn’t escape anyone’s attention Twitter is on track to becoming a mass phenomenon globally. After pressing a button on the box for a few seconds, all your Twitter followers get to see your heart rate along with a quick evaluation (