According to the embodiments, there is provided a disposable heart rate indicator (100, 200, 400, 600) comprising a power source (114) for generating power to the heart rate indicator (100, 200, 400, 600), at least two electrodes (104A, 104B) for detecting a person's heart beat, a processor (106, 606) and a light signal emitting head (108), the processor (106, 606) being operatively coupled to the at least two electrodes (1 04A, 104B) and being configured to receive a signal on each heart beat detected by the electrodes (104A, 104B) and visually indicate a detected heart rate by means of optical light emitted by the light signal emitting head (108). The heart rate indicator (100, 200, 400, 600) further comprises conductor means (110) coupled between the light signal emitting head (108) and the processor (106, 606), the conductor means (110) being arranged to extend from a heart beat detection area formed by the electrodes (104A, 104B) and the processor (106, 606) such that the light signal emitting head (108) is visible during use.
