Effects of long-term tai chi ball practice on balance performance in older adults. Author: Xiao CM. Affiliation: Department of Health Promotion and Physical Education, Beijing Institute of Graphic Communication, Beijing, China. Conference/Journal: J Am Geriatr Soc Date published: 2014 May Other: Volume ID: 62 , Issue ID: 5 , Pages: 984-5 , Special Notes: doi: 10.1111/jgs.12805 , Word Count: 1 PMID: 24828932