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Effects of Innovative Tai Chi on Dynamic Balance in Elderly Female Patients with Knee Osteoarthritis: 277 Board #128 May 27, 9

PURPOSE: An Innovative Tai Chi Rehabilitation (ITCR) Program was developed for patients with knee OA. The aim of this study was to examine the effect of an Innovative Tai Chi Rehabilitation (ITCR) Program on dynamic balance during gait in elderly female patients with knee osteoarthritis (KOA). METHODS: A single-blind, randomized trial of Innovative Tai Chi Rehabilitation Program was conducted. Each sessions of program lasted 60 minutes and were performed three times a week for total 24-week. 60 female patients aged from 60 to 70 years (who met the American College of Rheumatology criteria) were enrolled from three communities from Wujiaochang Town in Shanghai. 40 subjects (66.67%) were retained at the end of this study. They were then divided into two groups, e.g., Tai Chi group with a 24-week ITCR Program (TC, n=21, 64.20 ± 3.05 yr.) and control group with no intervention (CG, n=19, 64.53 ± 3.51 yr.). Patients were required to perform normal walking in Biomechanics lab. The center of pressure (COP) and Berg Scale (BS) data were collected. The primary outcomes were the changes in maximal lateral displacement (MLD) and mean velocity (MV) of COP in gait. Secondary outcome was the change of BS. Two-way ANOVAs were executed to determine the significant differences. RESULTS: After a 24-week intervention, TC showed a significant increase in BS (from 53.05±3.04 to 54.95±1.16, p<0.01) while no changes were found in CG. Significant decreases were observed in MLD (cm) (left: 18.61±5.13 to 4.67±1.87, p<0.05 vs. right: 9.24±5.11 to 6.41±2.10, p<0.05) and MV (cm/s) (left: 60.77±16.10 to 17.83±5.32, p<0.05 vs. right: 29.60±12.04 to 20.18±6.53, p<0.05) of COP (two legs) for TC after the intervention; meanwhile no changes were found in MLD and MV of COP (two legs) for CG. Moreover, between-group differences were not only found in MLDleft (compared to CG, TC decreased by 9.42, p<0.01), but also observed in MVleft (compared to CG, TC decreased by 28.46, p<0.01) and MVright (compared to CG, TC decreased by 16.11, p<0.05) after a 24-week intervention. CONCLUSIONS: After a 24-week ITCR program, TC showed a better Berg score, a lower max lateral displacement and mean velocity of COP in gait. Therefore, the Innovative Tai Chi Rehabilitation Program would be beneficial to improve dynamic balance in elderly patients with knee osteoarthritis.