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I was delighted to see a review article by Wang and colleagues¹ on Tai Chi exercise. I noted several errors in the tables and inconsistencies in Tai Chi terminology used. My concerns are the following:

1. Form and postures are not interchangeable terms. The Classical Yang style of Tai Chi is considered a form of Tai Chi.
   
2. Classical Yang Style of Tai Chi has 108 postures. To aid readers with understanding the information in these tables, it would be easier to use "Classical Yang" as the style (as indicated), with a footnote that it includes 108 postures.
   
3. A definition of the "chronic condition" would aid clarification in how studies reviewed were included. The study by Schneider and Leung² involved healthy subjects, comparing cardiorespiratory responses between Wing Chun and Tai Chi practitioners. It is unclear to me how healthy subjects meet the inclusion criteria of "chronic condition."
   
4. A better transition from "chronic . . . [Full Text of this Article]

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