Key result
High-intensity exercise impaired respiratory muscle perfusion in patients with COPD, as intercostal, scalene, and abdominal blood flow index increased during hyperpnea but not during cycling.
Why the study?
Does high-intensity exercise impair respiratory muscle perfusion compared to hyperpnea in patients with COPD?
Observational
Does high-intensity exercise impair respiratory muscle perfusion compared to hyperpnea in patients with COPD?
High-intensity exercise impairs extradiaphragmatic respiratory muscle perfusion in COPD patients, which is associated with greater dyspnea.
May limit exercise tolerance via dyspnea in COPD; leaves open perfusion-targeted interventions.
We simultaneously assessed the blood flow index (BFI) in three respiratory muscles during hyperpnea and high-intensity constant-load cycling sustained at comparable levels of work of breathing and respiratory neural drive in patients with COPD. We demonstrated that high-intensity exercise impairs respiratory muscle perfusion, as intercostal, scalene, and abdominal BFI increased during hyperpnea but not during cycling. Insufficient adjustment in respiratory muscle perfusion during exercise was associated with greater dyspnea sensations in patients with COPD.
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Louvaris et al. (2020) conducted an observational in COPD. High-intensity constant-load cycling vs. Hyperpnea was evaluated on Blood flow index (BFI) in three respiratory muscles. High-intensity exercise impaired respiratory muscle perfusion in patients with COPD, as intercostal, scalene, and abdominal blood flow index increased during hyperpnea but not during cycling.
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