A method and a device for signalizing a walking or running speed to a runner or walker during walking or running, wherein the runner or walker wears a garment. To conveniently inform the walker or runner about his or her actual walking or running speed, the method includes: a) Determining the actual speed by a speedometer which is worn or carried by the runner or walker； b) Transferring of the actual speed into a light signal, wherein the light signal corresponds to the speed； c) Displaying the light signal by a light emitting element which is attached to the or integrated into the garment.
