1. A physical activity monitoring system comprising: a communications network; a wearable sensor device configured to generate physiologic data associated with a sensed physiologic condition of a wearer, and to generate audio context data associated with a sensed audio context of the wearer, and to form a communication link with the communications network; a memory operably connected to the communications network and configured to receive and store the generated physiologic data and the generated audio context data; a computer and a computer program executed by the computer, wherein the computer program comprises computer instructions for rendering activity data based on the stored physiologic data and the stored audio context data, wherein the stored audio context data is analyzed to distinguish between different activities, the computer operably connected to the memory and configured to obtain the stored physiologic data and the stored audio context data; and a user interface operably connected to the computer for rendering the activity data.