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 　　Music. It can tug¹ at our hearts, perhaps even literally². Because when people sing together their hearts begin to beat in sync with each other. Researchers monitored the heart rates of 15 teenagers as they produced sounds solo. The participants either hummed one note or sang a hymn³ while breathing whenever they wanted. They also performed a mantra thay required them to breathe only at the end of each phrase. Then the exercises were repeated by groups of five subjects all singing at once. And when the subjects performed regular song structures in unison⁴, their hearts rates slowed down and sped up at the same time. Vocal⁵ preformancesimpose set breathing patterns which regulate and synchronize⁶ heart beats. According to the researchers, choral participation⁷ can thus improve well-being⁸. It not only tones the cardiovascular system but so produces the same relaxing effect as breathing exercises practiced in Yoga. So music truely soothes⁹ the savage¹⁰ breast, or at least the heart beating inside it.