Incage, here's a little more info about how the Bodybugg works (from the 24hourfitness website):
"The bodybugg system uses a patented process to measure calorie burn. The process is based on:
Motion: The armband contains an accelerometer that measures motion from multiple perspectives.
Steps: The accelerometer counts steps by measuring the distinct patterns created by running or walking.
Galvanic skin response: When you sweat, your skin becomes more electrically conductive. This measurement helps the device understand how active you are.
Skin temperature: There’s an electronic thermometer inside your armband that monitors how hot you are.
Heat flux: When you move, your muscles produce heat. Your armband measures the heat that’s flowing from your body into the environment.
After you upload data from the bodybugg armband to your computer, you can use the web-based application to see how many calories you’ve burned throughout the day or during specific activities. The bodybugg system will actually calculate your calorie burn per minute."
Do a quick Google search if you'd like to learn more. Hope this helps
