In addition, training in abdominal breathing can prevent hyperventilation syndrome. Due to imbalance in their autonomic nervous system, people who suffer from this disorder often feel they are suffocating and anxiously try to suck in more oxygen. Their breathing becomes shallow and rapid, purging carbon dioxide (CO2) and causing its concentration to fall. This in turn results in vasoconstriction and still more panicky rapid breathing.
此外，腹式呼吸訓練還可以預防「過度換氣症候群」──這類患者往往因為自律神經失調而有窒息感、自覺吸不到空氣，緊張地拚命想吸入更多氧氣，於是呼吸變得又快又淺，導致二氧化碳不斷排出、濃度變低，引起血管短暫收縮，病人慌張之下就更快速呼吸，導致惡性循環。