An apparatus for aiding the self-regulation of stress, including a vibrating element vibratable at varying frequencies of vibration, and heart signals or breathing signals monitoring means, and a data processing means. The data processing means includes means for calculating a stress indicator value, based on the heart signals or the breathing signals and that the data processing means includes a means of determining a mechanical vibration rhythm, based on the stress indicator value, including vibrations of one or more frequencies, which is induced in the vibratable element. The data processing means is configured, to create continuous real time feedback loop between the measured heart or breathing rate and calculated stress indicator value and the induced vibration rhythms. Attaching means are included, which can be a strap or harness, or attachments for articles of clothing, for attaching the apparatus to the user—；such that the vibrating element of the apparatus is located in the thoracic region of the user's body.
