The “Aachen sings” study (“Aachen choir engagement study into GERD symptoms”): moderate singing and breathing exercises in a choir reduce reflux symptoms – a cohort study in non-specialist choristers

Background  The influence of singing activities and breathing exercises on the presence of gastroesophageal reflux disease (GERD) symptoms is not clear. While an Austrian study found symptom reduction, an Italian study showed more symptoms in professional opera choristers. These contradictory results may be due to differential intensity of the singing exercises. We therefore developed a questionnaire to investigate the presence of GERD typical symptoms and defined GERD in nonprofessional choristers with moderate singing activity and breathing exercises and compared the results to those from related non-singing control persons. Methods  434 actively engaged lay-choir persons and 310 non-singing friends or relatives answered questions in a questionnaire regarding basic data, singing habits, GERD symptoms, and past or present diagnostic events and medications. Results  Non-singing control persons experienced more frequently heartburn (1.1 ± 4.1 vs. 0.5 ± 1.2 episodes/week, p = 0.001) and acid regurgitation (0.9 ± 4.1 vs. 0.5 ± 1.3 episodes/week, p  Conclusion  The frequency of reflux symptoms and GERD is probably still increasing. Moderate singing activities and breathing exercises seem to be helpful in avoiding reflux symptoms such as heartburn and acid regurgitation.