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National Jewish Health Home > Disease Information > Diseases We Treat > Asthma Home > Kids and Asthma > Wizard > When Do You Use Your Peak Flow Meter? - Page 2
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Hannah also uses her peak flow meter before and after her medicine if she is having trouble breathing. This helps her see if her breathing got better.
Some people also use their peak flow meter before and after exercise to see if they are having trouble breathing with exercise.
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