There is provided a radio apparatus for a gym device, the apparatus comprising: an antenna array comprising at least two antenna elements for wirelessly communicating with exercise sensors; at least one processor and at least one memory including a computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the radio apparatus at least to: generate at least one antenna beam pattern with at least one of the at least two antenna elements; and communicate wirelessly with an exercise sensor by applying the generated at least one antenna beam pattern.