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Exercise and nasal patency.

R D Forsyth, P Cole, R J Shephard

    Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
    |September 1, 1983
    PubMed
    Summary
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    Exercise intensity significantly reduces nasal airflow resistance in healthy individuals. Resistance decreases with greater exertion and can persist post-exercise, impacting nasal breathing dynamics.

    Area of Science:

    • Physiology
    • Respiratory Medicine

    Background:

    • Nasal airflow resistance is a key determinant of respiratory function.
    • Understanding exercise-induced changes in nasal resistance is crucial for respiratory health.

    Purpose of the Study:

    • To investigate the effects of exercise intensity and duration on nasal airflow resistance.
    • To characterize the time course of nasal resistance changes during and after exercise.

    Main Methods:

    • 20 healthy subjects underwent measurements of nasal airflow resistance.
    • Resistance was assessed at rest, during graded exercise (25-75% VO2max), and during recovery.
    • Effects of xylometazoline were used as a comparator.

    Main Results:

    • Exercise reduced nasal resistance, primarily influenced by intensity, not duration.

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  • A rapid decrease in resistance was observed, followed by a progressive decline.
  • Resistance reduction persisted into the recovery period, with longer recovery times needed after higher intensities.

    • Conclusions:

    • Exercise intensity is a significant factor in reducing nasal airflow resistance.
    • Post-exercise nasal resistance changes are dependent on exercise intensity and duration.
    • These findings have implications for understanding respiratory responses to physical activity.