In a normal man, how many seconds one breath normally takes to complete?
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Learn how to take a deep, full breath.
A full deep inhalation usually takes about 20 seconds before you exhale.
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For humans, the typical respiratory rate for a healthy adult at rest is 12–18 breaths per minute. The respiratory center sets the quiet respiratory rhythm at around two seconds for an inhalation and three seconds exhalation. This gives the lower of the average rate at 12 breaths per minute.
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