A system for continuously tracking at least one competitor (30, 130, 230) on an athletics track, the system comprising: - at least one wireless transmitter operable to wirelessly submit a query provided with a timestamp, - at least one wearable transponder (10, 110, 210) attachable to the at least one competitor (30, 130, 230), the at least one wearable transponder (10, 110, 210) being configured to receive the query, to generate a transponder specific response and to wirelessly transmit the response, - at least three stationary receivers (120, 220, 320) distributed across or around the athletics track, wherein each one of the three stationary receivers (120, 220, 320) is configured to receive the transponder specific response and to determine a runtime, wherein the runtime is indicative of a point in time relative to the timestamp at which the transponder specific response has been received by the respective stationary receiver (120, 220, 320), - a processing unit connected to the at least three stationary receivers (120, 220, 320) and configured to determine a position of the at least one wearable transponder (10, 110, 210) relative to the athletics track or relative to the at least three stationary receivers (120, 220, 320) on the basis of the runtimes received from the at least three stationary receivers (120, 220, 320), wherein the processing unit is configured to successively determine a series of positions of the at least one wearable transponder (10, 110, 210) during a predefined time interval and to derive at least one of the following states of movement of the wearable transponder (10, 110, 210) on the basis of the series of positions: a velocity, a direction of movement and/or a rotation of the at least one wearable transponder (10, 110, 210), from data signals provided by a motion sensor and included in the transponder specific response,, the motion sensor integrated into the at least one wearable transponder and including a set of one axial accelerometer and one tri-axial gyroscope and one tri-axial magnetometer. - at least one wireless transmitter operable to wirelessly submit a query provided with a timestamp, - at least one wearable transponder (10, 110, 210) attachable to the at least one competitor (30, 130, 230), the at least one wearable transponder (10, 110, 210) being configured to receive the query, to generate a transponder specific response and to wirelessly transmit the response, - at least three stationary receivers (120, 220, 320) distributed across or around the athletics track, wherein each one of the three stationary receivers (120, 220, 320) is configured to receive the transponder specific response and to determine a runtime, wherein the runtime is indicative of a point in time relative to the timestamp at which the transponder specific response has been received by the respective stationary receiver (120, 220, 320), - a processing unit connected to the at least three stationary receivers (120, 220, 320) and configured to determine a position of the at least one wearable transponder (10, 110, 210) relative to the athletics track or relative to the at least three stationary receivers (120, 220, 320) on the basis of the runtimes received from the at least three stationary receivers (120, 220, 320),