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Frontiers | A Practical Guide to Resonance Frequency Assessment for Heart Rate Variability Biofeedback
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Andrew D. Huberman, Ph.D. on Twitter: "Heart Rate Variability• _ Inhale= diaphragm moves down= heart volume increases= sinoatrialnode signals brain = brain signals heart to speed up. _ Exhale= diaphragm moves up=
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Cardiology: Why does my heart rate speed up when I breathe in, and slow down when I breathe out? - Quora
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