From a study by Escher J, and Evéquoz D:
The effect of trophotropic (relaxing) music on heart rate and heart rate variability has been investigated in 23 healthy young individuals by means of 24-hour Holter-ECG. Relaxing music (Bach, Vivaldi, Mozart) resulted in significant reduction of heart rate and also significant reduction of heart rate variability [emphasis added]. The significance of these results for the use of music in coronary heart disease is discussed.
The fact is, not every kind of music you hear is good for you. What’s been proven, time and time again, is that classical music is good for you. There’s really no simpler lifestyle change you can make than changing the station on your radio, or on your streaming music channel. Load up your mp3 player with the right kind of music, and change your life, starting with a lower heart rate!