Ninety patients with asthma were selected for comparison of Buteyko and Pranayama breathing techniques. A Pink City Lung Exerciser (PCLE) was used to mimic Pranayama. Sixty nine patients completed the study.
‘The Buteyko breathing technique can improve symptoms and reduce bronchodilator use but does not appear to change bronchial responsiveness or lung function in patients with asthma.’
S Cooper, J Oborne, S Newton, V Harrison, J Thompson Coon, S Lewis and A Tattersfield Effect of two breathing exercises (Buteyko and pranayama) in asthma: a randomised controlled trial Thorax 2003;58:674-679