Postmenopausal women without hormone replacement therapy are associated with higher risk of cardiac morbidity and mortality. They are likely to experience depressive symptoms after menopause, and the comorbidity of depression are related to altered autonomic function. We expect that postmenopausal women with depressive symptoms who receive breathing training will demonstrate decreased depressive symptoms and increased heart rate variability immediately upon and later after completion of training, and optimally contributing to improve autonomic nervous regulation in their later life to prevent undesired cardiac outcomes.