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Exhaled breath condensate pH is increased after moderate exercise.
Journal article

Exhaled breath condensate pH is increased after moderate exercise.

  • Riediker M Institute for Occupational Health Sciences, Lausanne, Switzerland. michael.riediker@alumni.ethz.ch
  • Danuser B
  • 2007-03-29
Published in:
  • Journal of aerosol medicine : the official journal of the International Society for Aerosols in Medicine. - 2007
Adolescent
Adult
Aerosols
Breath Tests
Exercise
Exercise Test
Exhalation
Female
Follow-Up Studies
Heart Rate
Humans
Hydrogen-Ion Concentration
Male
Reproducibility of Results
Walking
English Exhaled breath condensate (EBC) of patients with inflammatory diseases has a decreased pH. This could make EBC-pH an interesting tool for studying work-related inflammatory processes, provided that normal work activities would not interfere with the results. We consequently tested whether EBC-pH was influenced by moderate exercise. Fifteen healthy nonsmoking subjects exercised for 30 min on a treadmill by walking at 60% of predicted maximal heart rate. Four EBC samples were obtained: one to learn the technique, one before exercise, one immediately after exercise, and one 60 min later. EBC-pH was significantly increased after exercise compared to before (mean of 8.27 vs. 8.20, p = 0.001). It remained significantly increased after 60 min (8.25, p = 0.02). The increase was strongest for the subjects with lowest pH. All pH measures were significantly correlated with each other. Light physical activity increases EBC-pH. The persistence of this increase after the end of the exercise poses a serious challenge if one wants to use this technique for health surveys or for diagnostic purposes. It could prevent the observation of a lowered EBC-pH that results from an inflammatory response.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://sonar.ch/global/documents/284728
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