Music can strengthen the heart - and improve the recovery of patients suffering from heart disease.
Cardiologists said the findings suggested that all people could boost the health of their hearts simply by listening to their favourite tunes.
Prof Delijanin Ilic, the lead investigator, from the Institute of Cardiology, University of Nis, Serbia, said: "When we listen to music we like then endorphins are released from the brain and this improves our vascular health. There is no 'best music' for everyone - what matters is what the person likes and makes them happy."
Prof Ilic said: "It is also possible that it is better to have music without words, because it is possible that the words themselves can upset the emotions."
Prof Ilic said: "Listening to favorite music alone and in addition to regular exercise training improves endothelial function and therefore may be an adjunct method in the rehabilitation of patients with coronary artery disease. There is no 'ideal' music for everybody and patients should choose music which increases positive emotions and makes them happy or relaxed."