For those unfamiliar with what the biostamp does, it's a mesh of circuits and sensors that can record electrophysiological data like skin temperature and hydration state of the wearer.

ENGADGET

The temperature near your skin is greater than the temperature on the surface of your clothes, mainly due to a layer of trapped air near your body.

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"We can't approach the subtlety of skin, sensation of temperature, touching things yet, " admits Gow.

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For Rory, initially misdiagnosed with a stomach flu, the symptoms included an abnormally high temperature, mottled skin and a sore leg.

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Energy is generated by the body's adjustments to differences in temperature between the skin and the outside air, which can be harvested.

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Unlike almost all competitive products that use only one sensor to 'read' the body, BodyMedia's monitors incorporate temperature, heat flux, galvanic skin response and 3-axis accelerometer sensors to get accurate measurements of calorie burn, exercise intensity and sleep patterns that affect weight as well as health.

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