[csours]

Neat! I've been thinking about this lately. If you had accurate CO2 and O2 measurements, you could calculate how many milligrams of fat you are burning during exercise.

[nradov]

This device doesn't appear to contain a CO2 sensor.

[maxwell86]

It contains a laser CO2 sensor.

[carbocation]

No, it does not:

> Several compromises were made in the design of the unit: no CO2 sensor