BodyMedia has created the most efficient way to date, for you to know whats going on in your body. They announced they are going to be able to communicate with smart-phones using Blue-tooth to their armband sensors. They have been working closely with Apple and Google to develop this amazing smart-phone application. It means a person can monitor through their smart-phone their physical activity, calories burned, body heat, sleep efficiency and numerous more things since it got a whooping collection of 9,000 variables all collected by the armband sensor. Have a look of the video below to see the device in action.