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

This study examines whether outpatient pulmonary rehabilitation — structured exercise and breathing programs — can improve quality of life and physical fitness in patients with metastatic non-small cell lung cancer (NSCLC) who are receiving maintenance immunotherapy after their initial chemotherapy-immunotherapy treatment. **You may be eligible if...** - You are 18 or older with metastatic (Stage IV) or recurrent non-squamous NSCLC confirmed by biopsy or cell testing - You have not received prior immunotherapy for advanced disease (except your current first-line treatment) - Your cancer responded to or stabilized on four cycles of initial chemo-immunotherapy - You are now starting maintenance therapy - You are in good general health (ECOG performance status 0 or 1) **You may NOT be eligible if...** - You have brain metastases causing symptoms - You have bone metastases at risk of fracturing with exercise - You have severe heart failure, unstable chest pain, or another serious condition that worsens with exercise - You had major surgery within 28 days prior Talk to your doctor to see if this trial is right for you.