Sing for a long and healthy life?

Approximately one-third of global mortality is attributed to cardiovascular causes, encompassing a spectrum of physical and mental health challenges.1 The functioning of the cardiopulmonary system plays a pivotal role in determining the prognosis of individuals’ post-myocardial infarction and in cases of heart failure. Respiration, a fundamental bodily function, extends its influence over numerous facets of human well-being, encompassing cardiac performance, lung function, communication, and emotional equilibrium. Furthermore, the state of one’s mental health can significantly impact the overall prognosis of cardiovascular disease.2 Music therapy, particularly singing, is a remarkable avenue for promoting heart health. The intrinsic understanding that singing uplifts the mind, body, and soul has been embedded in our collective consciousness. Singing within the confines of temples and churches elevates one’s spirits. It acts as a conduit for self-actualization and self-expression, offering a cathartic release for pent-up emotional tensions.3 While the art of singing has been appreciated for centuries, the scientific exploration of singing and its effects on cardiovascular health remains ripe for comprehensive clinical investigation. The benefits of singing are multifold (Figure 1). Singing is a physically engaging and mentally invigorating activity. It demands a meticulous approach to voice production, entailing controlled respiration. In essence, it involves maintaining correct posture, executing a brief yet deep inhalation while engaging the diaphragm and sustaining a prolonged exhalation. Singing necessitates a greater and more sustained expiratory pressure than regular speech to maintain a consistent vocal volume. This active engagement of the respiratory system not only generates the requisite air pressure for vocal fold function but also regulates vocal intensity. The musical components of melody and dynamics can be expertly harnessed to influence the timing and strength of contractions in the respiratory muscles. Empirical evidence confirms that singing enhances respiratory function across diverse target groups, including individuals with conditions like Parkinson’s disease, cerebral palsy, and respiratory ailments such as asthma and chronic obstructive pulmonary disease. Given the close interplay between cardiac output and pulmonary function, it is likely that singing also augments heart function. Singing triggers acute physiological responses akin to moderate-intensity physical activity, with elevated levels of oxygen consumption, heart rate, and volume per breath, surpassing those observed during a leisurely walk.4 Minute ventilation significantly increases during singing, further underscoring its potential benefits. For individuals who face physical limitations or debility that hinder their ability to engage in traditional forms of exercise, such as walking, singing can indeed present a valuable alternative. Singing for a long life and good health? Illustration by Dennis Mathias, medical illustrator, [email protected] Both solo and group singing contribute positively to overall well-being. The rhythmic breathing pattern inherent to singing influences heart activity, leading to the synchronization of heart rate variability with respiration, a phenomenon known as respiratory sinus arrhythmia. This synchronization has a subjective and biologically calming influence, fostering enhanced cardiovascular function. It is particularly pronounced during slow-paced breathing and at lower respiration rates. The choice of musical structure, whether it’s a simple song like humming or mantra chanting or a more intricate hymn, can influence heart rate variability.5 This propensity for entrainment among singers, marked by synchronized heart rate acceleration and deceleration, is especially evident when they harmoniously sing straightforward compositions in unison. The underlying cause of this sinus arrhythmia is not entirely understood, but it’s a subject of ongoing exploration. It is suggested that the benefits of solo and group singing may vary or potentially complement each other, warranting further research to determine their relative impact on cardiovascular health. Music’s influence on cardiac function is evident,6–8 with heart and respiratory rates higher and heart rate variability lower during exposure to stimulating music than soothing compositions. Singing, often accompanied by music, can trigger musical frissons characterized by increased heart and respiratory rates. Furthermore, music elicits higher heart and respiratory rates than moments of silence, with pleasant music evoking more pronounced responses than unpleasant counterparts. Recent insights indicate that music can also affect the regional activity of the heart, leading to changes in electrocardiogram amplitude patterns.7 In clinical settings, the therapeutic potential of singing and music is evident, as it can alleviate pain and anxiety while contributing to reductions in blood pressure and respiratory rate.9 Therefore, singing emerges as an accessible and safe adjunct for intervention and therapy. It’s important to acknowledge that the cardiac effects of singing, while present, may be subtle in magnitude, and findings from studies in this domain are occasionally inconsistent.7 Consequently, there is an urgent need for systematic, high-quality research to delve into the impact of singing on the heart, both in healthy individuals and patients, particularly in settings like churches and temples.10 It’s indeed possible that in the future, professional organizations such as the American Heart Association, American College of Cardiology, and the European Society of Cardiology may incorporate singing as a recommendation for better health alongside the established pillars of regular exercise, a healthy diet, and optimal sleep. Overall, the narrative underscores the exciting possibilities of singing as a holistic approach to heart health and calls for further exploration and recognition of its therapeutic potential.