pulmonary rehabilitation is beneficial for chronic lung diseases

For COPD patients, anyone not in Group A would benefit from pulmonary rehab.

Source

Pulmonary rehabilitation is a comprehensive program that combines exercise training, nutritional support, education, and social support for patients with chronic lung conditions. It has been shown to relieve symptoms, improve quality of life, and decrease frequency of hospitalizations in patients with COPD. Clinicians should consider adding this to appropriate medical therapy in symptomatic patients with an FEV1 of less than 50% of predicted and to patients recovering from COPD exacerbation; particularly those recently hospitalized or treated with systemic steroids would benefit from pulmonary rehabilitation.