I read with interest the study by Polkey et?alsup1/sup in a recent issue of CHEST (May 2018). The suggestion that Tai Chi is an all-in-one substitute for a conventional exercise-based comprehensive pulmonary rehabilitation (PR) program is not supported by the data presented, unless to say that neither worked. There is no monopoly on the vehicle used for fitness training in patients with chronic respiratory conditions, provided it is prescribed using a pattern and dose to match the intended goals for endurance, strength, and flexibility.
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