Why then should we add more to the excellent guidelines already developed? The recent Canadian Thoracic Society Clinical Practice Guideline, “Optimizing Pulmonary Rehabilitation in Chronic Obstructive Pulmonary Disease–Practical Issues,”4 employed a slightly different approach that complements, rather than competes with, the existing guidelines. Instead of a comprehensive review of all available data pertaining to the entire field of PR, the working group focused on six important practical questions voiced by representative health-care professionals who participate in rehabilitation programs. These questions were chosen to add an important clinical dimension to a rigorous standardized method of data gathering and evidence grading. Questions were constructed in accordance with a “PICO” process, taking into consideration the Problem, Intervention, Comparison and Outcomes within each question. This enabled the working group to construct an answerable question and to develop an appropriate search strategy that outlined the types of studies and databases to search, as well as the inclusion/exclusion criteria. Importantly, this also enabled the formulation of meaningful recommendations to specifically address these important, focused clinical questions.