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Progressive mechanical ventilatory constraints with aging.

D S DeLorey1, T G Babb

  • 1Institute for Exercise and Environmental Medicine, Presbyterian Hospital of Dallas and The University of Texas Southwestern Medical Center, Dallas, Texas, USA.

American Journal of Respiratory and Critical Care Medicine
|July 3, 1999
PubMed
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Aging progressively increases mechanical ventilatory constraints, with elderly individuals showing significant limitations in breathing during exercise. These age-related changes impact minute ventilation and lung volumes, affecting exercise capacity.

Area of Science:

  • Physiology
  • Gerontology
  • Exercise Science

Background:

  • Aging is associated with physiological changes that can affect respiratory function.
  • Understanding how mechanical ventilatory constraints change with age is crucial for assessing exercise capacity in older adults.

Purpose of the Study:

  • To investigate the progressive nature of mechanical ventilatory constraints across different age groups during exercise.
  • To examine the impact of aging on minute ventilation, lung volumes, and expiratory airflow limitation.

Main Methods:

  • Studied young, senior, and elderly men and women performing graded cycle ergometry.
  • Measured minute ventilation (VE), lung volumes (EELV, EILV), and expiratory airflow limitation (EAFL) at rest, ventilatory threshold (VTh), and peak exercise.

Related Experiment Videos

  • Analyzed data using two-way ANOVA for age and gender effects.

    • Main Results:

    • Minute ventilation (VE) increased with age at submaximal work rates but was lowest in the elderly at peak exercise.
    • End-expiratory lung volume (EELV) and end-inspiratory lung volume (EILV) increased progressively with age in both genders.
    • Expiratory airflow limitation (EAFL) increased with aging, being most pronounced in the elderly group.

    Conclusions:

    • Mechanical ventilatory constraints are progressive with aging.
    • Elderly individuals exhibit marked mechanical ventilatory constraints during exercise.
    • The precise impact of these constraints on exercise tolerance requires further investigation.