Outpatient Pulmonary Rehabilitation in Non-small-cell Lung Cancer Receiving Immunotherapy

The aim of this prospective study is to evaluate the effects of an outpatient pulmonary rehabilitation program on the quality of life, performance and tumor growth of metastatic lung cancer patients receiving ongoing immunotherapy. The main questions it aims to answer are: The primary objective of the study is to assess the effects of outpatient pulmonary rehabilitation (OPR) on exercise capacity measured by difference in the 6-minute walking test (6MWT) in patients with advanced stage lung cancer receiving immunotherapy measured by difference in the 6-minute walking test (6MWT). Secondary endpoints in this study include progression free survival (PFS) and the effect of OPR on long term exercise capacity measured by 6MWT (difference in 6MWT after week 15 and 24). Researchers will compare two groups of patients: one group of patients receives 6 weeks of outpatient pulmonary rehabilitation (intervention group), while the other patient group serves as control since this is standard of care to evaluate the effects of outpatient pulmonary rehabilitation.