Related Experiment Video
Updated: Feb 26, 2026
04:12
Inspiratory Muscle Training as an Adjunct to the Treatment of Weaning Failure in Critically Ill Patients: A Practical Guide
Published on: January 30, 2026
566
Acute Effect of Inspiratory Muscle Training on Peripheral Tissue Oxygenation Behavior in Individuals With COPD: A
Natália Mota da Silva Borges1, Dyego Tavares de Lima1, Arthur Bruno de Abreu Morais2
1Postgraduate Program in Physical Therapy, Universidade Federal da Paraíba, João Pessoa, Paraíba, Brazil.
Summary
High-intensity Inspiratory Muscle Training (IMT) may reduce peripheral muscle oxygenation in COPD patients, while endurance IMT might improve it. Individualized IMT prescription is crucial for managing COPD.
Area of Science:
- Pulmonary Rehabilitation
- Exercise Physiology
- Muscle Metabolism
Background:
- Chronic Obstructive Pulmonary Disease (COPD) involves airflow obstruction and systemic changes, including altered muscle metabolism.
- The inspiratory metaboreflex may be activated in individuals with COPD.
- Near-infrared spectroscopy (NIRS) can assess peripheral muscle oxygenation.
Purpose of the Study:
- To investigate the acute effects of different Inspiratory Muscle Training (IMT) loads on peripheral muscle metabolism in COPD patients.
- To evaluate the impact of high-load (strength) and low-load (endurance) IMT versus a sham protocol using NIRS.
Main Methods:
- A randomized, blinded, crossover study involving 29 COPD participants.
- Three sessions were conducted: high-load IMT (60% MIP), low-load IMT (30% MIP), and sham.
- Gastrocnemius muscle oxygenation was measured using NIRS pre- and post-intervention.
Main Results:
- Low-load IMT (endurance) showed differences in final tissue oxygen saturation.
- High-load IMT (strength) resulted in a shorter oxygen desaturation time.
- Advanced COPD patients (GOLD 3-4) showed higher oxygen desaturation rates during strength IMT.
Conclusions:
- Acute high-intensity IMT might decrease peripheral perfusion, potentially activating the metaboreflex in COPD.
- Endurance IMT appears to enhance peripheral perfusion.
- Tailored IMT protocols are essential for COPD management, considering disease severity.
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