A system for processing heart rate measurement data includes a server computer configured to: associate, during a registration procedure for a measurement device of a user, a device identifier of the measurement device with a user account of the user stored in the server computer receive a device identifier and real-time heart rate measurement data over a network connection identify the users measurement device from the received device identifier store the received heart rate measurement data to the user account of the user on the basis of the association between the received device identifier and the corresponding user account compute, repeatedly during the physical exercise from the received heart rate measurement data, advanced performance data comprising at least one value which accumulates during the physical exercise and transmit the computed advanced performance data to the equipment interface unit over the network connection during the physical exercise.
