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How to Use a Peak Flow Meter

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Updated: September 19, 2008

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Exhale Through the Peak Flow Meter Fast and Hard
Peak Flow Meter Exhale

Exhaling Through Peak Flow Meter

Photo courtesy of A.D.A.M.
Next, you want to breathe out what is called a "hard, fast blast." This means that you blow out as hard and fast as you can through the peak flow meter. Do NOT breathe out slow and steady. That will not show how strong your lungs are. Instead, focus on exhaling forcefully and quickly, to move the marker as far as you can with your breath.

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