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People with COPD who need and use continuous oxygen therapy 24 hours a day tend to have a longer lifespan than those who use it only while awake (15 hours per day). In turn, individuals who use oxygen therapy 15 hours per day do better than those who use it only while they are sleeping. Publication Review By: Peter B. Terry, M.D., M.A. Published: 08 Aug 2011
In general, existing guidelines recommend that exercise training for patients with COPD be undertaken at least 2 to 5 days per week, for at least 20 to 30 min per session [12] over an 8 to 12 week period [12,49].