Long exhalation and the vagus nerve: what’s known and what’s hype
Does a long out-breath really “activate” your vagus nerve? What studies show about exhalation and HRV, and where polyvagal and gadget claims go too far.
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Slow breathing and heart rate variability: what actually happens in your body
At about six breaths a minute, your heart rate swings most with each breath. What studies show about slow breathing and HRV, and what they don’t.
