4-7-8 Breathing This technique, made famous by Dr. Andrew Weil, places the body into a state of deep relaxation. I use it on long flights to help fall asleep. Take a breath in, then exhale through your mouth with a whoosh sound. Close the mouth and inhale quietly through your nose to a mental count of four. Hold for a count of seven. Exhale completely through your mouth, with a whoosh, to the count of eight. Repeat this cycle for at least four breaths. Weil offers a step-by-step instructional on YouTube, which has been viewed more than four million times.
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