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Breathing patterns during varied activities.

D Paek1, F D McCool

  • 1Department of Medicine, Memorial Hospital of Rhode Island, Pawtucket.

Journal of Applied Physiology (Bethesda, Md. : 1985)
|September 1, 1992
PubMed
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Breathing through a mouthpiece significantly alters ventilation and breathing patterns during physical activity. These changes, along with activity type, impact inhaled particle deposition in the lungs.

Area of Science:

  • Physiology
  • Occupational Health
  • Environmental Health

Background:

  • Inhaled particle distribution and deposition are influenced by ventilation and breathing patterns during physical activity.
  • Understanding these patterns during specific activities is crucial but currently unknown.

Purpose of the Study:

  • To investigate the effects of mouthpiece use on ventilation and breathing patterns during various physical activities.
  • To determine if physical activity type influences breathing patterns independently of ventilation levels.

Main Methods:

  • Noninvasive measurement of minute ventilation (VE), tidal volume (VT), inspiratory time (TI), and total breathing cycle time (TT).
  • Subjects performed activities including bicycling, arm ergometry, lifting, and pulling, both with and without a mouthpiece.

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  • Measurements were taken using spirometry and body surface displacements.

    • Main Results:

    • Mouthpiece use significantly altered VE, VT, and TT by 16%, 34%, and 20% respectively across activities.
    • The mouthpiece effect on breathing patterns was less pronounced at higher ventilation levels.
    • Breathing patterns exhibited greater variability (VT and TI) during lifting compared to bicycling for a given VE.

    Conclusions:

    • Mouthpieces significantly alter breathing patterns during diverse physical activities and intensities.
    • Breathing patterns can vary substantially depending on the specific physical activity performed.
    • Both mouthpiece use and activity type are critical factors to consider when assessing inhaled particle dose in the lungs.