Motorola Motoactv :: How Does MA Calculate Calories Burned

Since there is no way to bypass a sensor for indoor spin class, I had to set my MA to stairstepper. I chose SS over Eliptical because I assume that the MA device would look for foot movement (to calculate calories) instead of arm movement (because the notes specifically say not to grip the stationary handles on the eliptical). Anyhow, I completed a 60+ minute spin class at vigorous effort for at least half and had an average heart rate around 75% and it said I only burned 300 calories. I know that 1 hr of spin burns close to 600 calories..does the MA device take into consideration the type of exercise chosen (e.g. stair stepper) and uses that activity blended with HR and motion to calculate the calories burned? If that is the case, then MOTO needs to do two things: 1) allow users to bypass sensors for exercise so they can still capture the proper exercise and not a "general" one and 2) create a "general" one for quick start options if someone doesn't care to record the activity type. It all depends on how calories burned are calculated.In the meantime, which activity should I use for Spin class....if the hands don't move, I would think that eliptical is not a good choice. What about running or walking...does that use arm movement also? Overall, would love a little more info on how the measurements are calculated.