Music has been found to decrease sympathetic nervous system activity reduce anxiety, blood pressure (BP), heart and respiratory rate and has positive effects on sleep via muscle relaxation and distraction from thoughts. As sleep is affected by both physiological and psychological factors, many researchers tried to explore effect of mind–body intervention like music on sleep. Pharmacological treatment to overcome sleep disorders are used widely, but their use is limited by side effects and long-term intervention. It has been found from population-based studies that approximately 30% of the adult samples drawn from different countries report one or more of the symptoms of insomnia like difficulty initiating sleep, difficulty maintaining sleep, waking up too early or non-restorative or poor quality of sleep. In patients of cardiovascular disorders (CVDs), respiratory disorders and metabolic disorders, chronic sleep disorders are common. Sleep disorders may result in fatigue, tiredness, depression and problems in daytime functioning. However, many research studies show abnormal sleep patterns or sleep disorders among older subjects and sleep workers. Sleep is a normal and essential human behaviour.
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