The idea sounds contradictory — even a bit scary ... but with key refinements: Take a normal breath in through your nose — not deep, just normal. Hold this breath comfortably for a count ...

His physical examination reveals normal lung sounds; a regular, bradycardic rhythm with varying intensities of the S1 heart sound; and intermittent large intermittent cannon A waves in the jugular ...

Optimal breathing is slow, deep, and diaphragmatic, meaning the diaphragm, rather than the chest, does most of the work. A healthy breathing pattern involves inhaling through the nose, allowing the ...