Is Singing good for Asthma?

Shaun BattRecently I typed this question in to Google, and there were many results. However I was very interested to read that the Royal Brompton & Harefield NHS Foundation Trust use singing on a weekly basis to help their patients with severe breathing problems. The reason I found this so interesting is that John Oxley often spoke of his singing lessons improving the breathing of his students at The Bristol Old Vic Theatre School – especially one student in particular who suffered from acute asthma and then went on to win the Laurence Olivier and Tony awards – London and Broadway for playing Piaf.