Can changing oxygen during rest help COPD patients exercise better?

This study looks at whether giving different oxygen levels during rest breaks between short cycling exercises helps people with COPD feel less breathless and exercise more easily. Fifty adults with moderate COPD will do four short cycling sessions with rest in between. Researchers will measure how hard the exercise feels, breathing patterns, heart rate, and sleep quality. The goal is to find a way to make exercise training more comfortable and effective for people with chronic lung disease.