The fitness/exercise equipment I typically use measures heart rate, speed, distance, cadence, etc. With this data, either the device, sync software, or website can approximate the calories burned during the periods of exertion. Measuring and tracking the data points is a great training tool but does not necessarily facilitate overall weight loss. The designers and engineers at BodyMedia have created the Bluetooth-enabled FIT LINK system that measures your actual calorie burn and relative effort levels throughout the entire day to assist you to better manage your fitness and weight loss goals.
The Gadgeteer , BodyMedia FIT LINK Armband Review, BodyMedia FIT LINK Armband Review