title: Response to Park's letter to the editor.
authors.affiliation: Department of Health and Physical Education, Hong Kong Institute of Education, Tai Po, N.T., Hong Kong. Electronic address: takcheng@ied.edu.hk.
authors.forename: Sheung-Tak
authors.initials: ST
authors.lastname: Cheng
mesh_terms: D003071:Cognition / Q000502:physiology*; D003072:Cognition Disorders / Q000150:complications* / Q000517:prevention & control*; D003704:Dementia / Q000150:complications* / Q000523:psychology*; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male