One of the ways of assessing the cardiovascular system is through measurement of various autonomic parameters i.e. heart rate, blood pressure and heart rate variability. The most commonly reported is heart rate variability (HRV) which is a manifestation of the interplay of the central nervous system and the autonomic nervous system on a beat-by-beat basis. One of the ways of its estimation is by calculating the elapsed time between two consecutive waves, called R waves, on a person's electrocardiogram (ECG). A consistent finding has been that there is reduced HRV in people who have suffered a myocardial infarction (MI), and this phenomena is a predictor of subsequent cardiac arrhythmia and even death. In addition, through previous work the PI has found that in LLD there are significant cardiovascular autonomic disturbances compared to age matched controls after controlling for various risk factors. Other studies conducted in depression across the human life span have found similar results. Hence, if there is a mind-body treatment that specifically targets autonomic dysfunction and has a positive benefit on depressive symptoms, it would be valuable to asses. The investigators would like to investigate such a therapy which has been selected based on previous reports of beneficial effects but has not been evaluated in a randomised controlled trial of LLD patients.