So with all the over calculation of the calories used, why would a company like Garmin [and others] come up with some over inflated number. You would think that with all the money they have with R&D that they could come up with a better number. Does anyone know how they come up with those numbers/calculations? I know as a Mercedes technician that the Magic 8 Ball has worked wonders for me. The amount of customers that come in with intermittent issues that get resolved with this thing is amazing. Maybe they have an industrial strength version.