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Install×The sigh breath is the most powerful single breath you will ever take. Two quick inhales through the nose, then one long slow exhale until your lungs are completely empty. Backed by neuroscience from Stanford University, this is the fastest known way to reduce stress in real time — and a single breath is often enough to feel the shift. Your body already does this involuntarily when overwhelmed. Now you can do it on purpose. Press play to begin.