Abstract: A treadmill arrangement, which comprises a treadmill and also a transmitter (31) that is arranged to be connectable to a treadmill user and to transmit an electromagnetic signal (30), at least one receiver (32) that is arranged in connection with the treadmill to receive the signal transmitted by the transmitter (31), apparatus for processing (33) the signal, and apparatus for generating (34) information that is arranged to receive the information arriving from the signal processing apparatus (33) and to generate therefrom the user's position data (39) and/or control information (38). To provide accurate operation, the transmitter (31) transmitting the electromagnetic signal (30) is a transmitter part of a heart rate monitor or a heart rate measuring system.