European Respiratory Society Aug 10 2025 People who practised blowing through a conch shell regularly for six months experienced a reduction in their symptoms of obstructive sleep apnoea (OSA), according to a small randomised controlled trial published today (Monday) in ERJ Open Research . OSA is a common sleep disorder where breathing repeatedly stops during the night due to a blocked airway. It leads to loud snoring, restless sleep and daytime sleepiness. It also increases the risk of high