Respiratory Training in the Treatment of Transdiagnostic Pathological Anxiety

This study is testing whether training people to control their breathing — which can calm the nervous system — helps reduce anxiety across several different anxiety disorders. It is based on the idea that many anxiety disorders share an underlying pattern of dysregulated breathing and arousal. **You may be eligible if:** - You are at least 18 years old - You have clinically elevated anxiety (score of 8 or above on the OASIS scale) - You have one of the following as your primary diagnosis: generalized anxiety disorder, panic disorder, health anxiety, agoraphobia, social anxiety, PTSD, acute stress disorder, or adjustment disorder with anxious mood - You are either not taking psychiatric medications or have been on a stable dose for at least 6 weeks - You can travel to the study lab and speak fluent English **You may NOT be eligible if:** - You have cardiovascular or respiratory conditions, epilepsy, a history of strokes or seizures, or a history of fainting - You are pregnant or breastfeeding - You are currently receiving other psychological treatment for anxiety - You have had a suicide attempt in the past 6 months - You have had psychosis in the past 6 months Talk to your doctor to see if this trial is right for you.