Inflammatory myopathies are rare autoimmune diseases leading to progressive muscle weakness, often including the respiratory muscles. This study aims to investigate whether inspiratory muscle training (IMT) using a threshold device can improve functional status in patients with inflammatory myopathy. Thirty-three patients will undergo a 3-month home-based IMT program with progressive resistance. Functional capacity, inspiratory muscle strength, lung function, diaphragmatic mobility, fatigue, and quality of life will be assessed at baseline and during follow-up. The primary hypothesis is that IMT will enhance inspiratory muscle strength and translate into better functional performance and quality of life.
Diagnosis of inflammatory myopathy according to European Alliance of Associations for Rheumatology / American College of Rheumatology criteria
Age ≥ 18 years
Stable clinical condition allowing participation in physical activity
Ability to understand and follow instructions
Cognitive impairment preventing proper exercise performance
Current respiratory tract infection
Previous respiratory muscle training within the last 12 months
History of spontaneous pneumothorax