Quote from barlows on Aug 18th, 2009, 1:21am:They all just guess for calories anyway, although I think the last I read was that Polar had a closer guess formula if there is such a thing.
Actually, I did a calorie comparison between my Edge 305, a Polar 7xx series and my Power Tap. The Edge and 305 were usually close to each other, while the Polar was off by 20% from the Power Tap. Maybe the Polar was correct, but the odds are against it in my mind.
Kingjason is correct though, it doesn't record calories when I spin (but it "might" if I used a speed sensor - not sure though).