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Related Experiment Videos

Selection criteria for exercise training in patients with COPD

A Patessio1, C F Donner

  • 1Division of Pulmonary Disease, Clinica del Lavoro Foundation, Medical Center of Rehabilitation, Veruno (NO)-Italy.

Zeitschrift Fur Kardiologie
|January 1, 1994
PubMed
Summary

Exercise training may improve exercise capacity in chronic obstructive pulmonary disease (COPD) patients by reducing ventilatory requirements. Training at a higher intensity, associated with lactic acidosis, may be more effective for COPD patients.

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Area of Science:

  • Pulmonary Medicine
  • Exercise Physiology
  • Cardiorespiratory Fitness

Background:

  • Chronic obstructive pulmonary disease (COPD) significantly limits physical performance due to ventilatory system derangements.
  • Exercise capacity in COPD patients can be improved by enhancing sustainable ventilation or reducing ventilatory demand during activity.
  • Previous exercise training studies in COPD have largely failed to improve maximal exercise ventilation (VEmax).

Purpose of the Study:

  • To determine if standard exercise training protocols induce physiological training effects in COPD patients.
  • To investigate if exercise training at a work rate inducing lactic acidosis is more effective than training below this threshold in COPD patients.

Main Methods:

  • Nineteen COPD patients underwent incremental and square wave exercise tests.

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  • An 8-week cycle ergometer training program was implemented.
  • Training involved either high-intensity exercise for 45 min/day or lower-intensity exercise for a proportionally longer duration.

    • Main Results:

    • The study aimed to assess training effects on ventilatory requirements and lactic acidosis thresholds.
    • Reduced CO2 output, potentially via lower lactate levels and bicarbonate buffering, is hypothesized to lower ventilatory demand.
    • The effectiveness of high-intensity versus low-intensity training on physiological adaptations in COPD was evaluated.

    Conclusions:

    • Exercise training may reduce ventilatory requirements in COPD patients, potentially through mechanisms related to lactate metabolism.
    • Training at a work rate associated with lactic acidosis might offer greater benefits for COPD patients compared to lower-intensity training.
    • Further research is needed to confirm the optimal exercise training strategies for improving exercise performance in COPD.