An electronic device and a method of measuring an amount of user physical activity by an electronic device are provided. The method includes establishing short range communication among a plurality of electronic devices, determining one of the plurality of electronic devices as a primary device, communicating state information of remaining electronic devices to the primary device, activating a sensor on a device having a highest priority among the plurality of electronic devices according to the state information, recording physical activity information according to physical activity sensed by the sensor, communicating the physical activity information to the primary device, calculating an amount of physical activity according to the communicated physical activity information, and synchronizing the amount of physical activity among the plurality of electronic devices.