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Updated: Jun 27, 2026
07:10
Home-Based Prescribed Pulmonary Exercise in Patients with Stable Chronic Obstructive Pulmonary Disease
Published on: August 24, 2019
Breathing pattern and thoracoabdominal motion during exercise in chronic obstructive pulmonary disease
G S Alves1, R R Britto, F C Campos
1Departamento de Fisioterapia, Escola de Educação Física, Fisioterapia e Terapia Ocupacional, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil.
Summary
Chronic obstructive pulmonary disease (COPD) patients exhibit increased abdominal motion and breathing asynchrony during exercise. Cycling effectively enhances ventilation in these individuals.
Area of Science:
- Respiratory Physiology
- Pulmonary Rehabilitation
Background:
- Chronic obstructive pulmonary disease (COPD) is characterized by breathing pattern and thoracoabdominal motion abnormalities.
- These abnormalities can significantly contribute to exercise limitation in COPD patients.
Purpose of the Study:
- To analyze changes in breathing patterns and thoracoabdominal motion during incremental exercise in COPD patients.
- To investigate the relationship between exercise intensity, ventilation, and respiratory asynchrony.
Main Methods:
- Twenty-two men with stable COPD underwent incremental cycle exercise testing.
- Inductive respiratory plethysmography was used to measure respiratory frequency, tidal volume, rib cage and abdominal motion contribution, and phase angle (asynchrony).
- Data were analyzed at rest and at three exercise intensity levels.
Main Results:
- Tidal volume and respiratory frequency increased with exercise intensity.
- Abdominal motion contribution to tidal volume significantly increased during exercise (from 49.8% at rest to over 63% during exercise).
- Respiratory asynchrony, measured by phase angle, significantly increased during exercise, independent of intensity.
Conclusions:
- Increased ventilation during exercise in COPD patients is linked to greater abdominal motion and increased respiratory asynchrony.
- Cycling exercise appears to be an effective modality for enhancing ventilation in COPD patients.
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