An embodiment comprises includes an apparatus with a housing wearable by a subject and a first sensor operable to detect a position of the subject. An embodiment of the apparatus includes a second sensor operable to detect a body state of the subject, where the first body state may be a vital sign such as heart rate, blood pressure, body temperature or respiratory rate. The apparatus may also include a wireless module, and be operable to transmit body state data and position data to a remote device. The apparatus may include a gyroscope or an accelerometer, and may be operable to detect rotational change in the subject's position about and axis, linear acceleration of the subject along an axis, a change in position of the subject, or a rate of change in position of the subject.