“Because it requires control of breathing and posture, singing lessons can improve quality of life measures and decrease anxiety in COPD patients, according to a study in the current issue of BMC Pulmonary Medicine…”
http://www.rtmagazine.com/respiratoryreport/2010-08-12_06.asp
Full study here: http://www.biomedcentral.com/content/pdf/1471-2466-10-41.pdf
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