“…Slow breathing training has been shown to be beneficial in cardiovascular disease (Bernardi, Spadacini, Bellwon, et al, 1998;Schein, Gavish, Herz, et al, 2001), probably due to its potential to increase baroreflex PCO2 Biofeedback in Asthma 19 sensitivity (Bernardi, Porta, Spicuzza, et al, 2002;Joseph, Porta, Casucci, et al, 2005).…”