Darcy D. Marciniuk, MD, FRCPC, FCAHS, Master FCCP is a Professor of Respirology, Critical Care and Sleep Medicine, and Associate Vice-President Research at the University of Saskatchewan, Saskatoon, SK, Canada. Dr. Marciniuk is recognized internationally as an expert and leader in clinical exercise physiology, COPD, and pulmonary rehabilitation with more than 425 invited national/international presentations and 240 peer-reviewed publications, book chapters, and reviews. Dr. Marciniuk serves as Deputy Editor – Outreach for the journal CHEST, is a past-President of CHEST and the Canadian Thoracic Society, past-Chair of the Forum of International Respiratory Societies (FIRS) and a Fellow in the Canadian Academy of Health Sciences.